5,552.74KOSPI · Oct 20 close · −3.73%

DailyDrop.

—Won-dollar exchange rate · Oct 20 · no confirmed close before press time
S&P 500—Nasdaq—KOSPI5,552.74▼3.73%10/20KOSDAQ—USD/KRW—WTI—
Society · CrimePress ✓ 4 outlets · condition of the patent attorney in cardiac arrest unconfirmed

Serial arson at 2 patent firms in Yeoksam-dong 7 minutes apart leaves 19 hurt… suspect in his 70s caught near Dongmyo Station

A man in his 70s who claimed a patent firm had defrauded him over a patent from 2000 is reported to have been arrested 4 years ago after targeting the same building.

A fire broke out at around 11:54 a.m. on the 20th at a patent firm’s office on the 3rd floor of the Sinmyeong Building in Yeoksam-dong, Gangnam District, Seoul, and about 7 minutes later, at around 12:01 p.m., flames also shot up at a patent firm’s office on the 4th floor of the Hanyang Building, about 200 m away, the Korea Herald and Seoul Economic Daily reported. Yonhap reported that because both sites were patent firm offices, police treated arson as a strong possibility from the start. According to the Korea Herald, the two fires left 19 people hurt, 5 of them seriously, and one patent attorney was found in cardiac arrest in a corridor and taken to hospital. Kyunghyang Shinmun reported that some employees even clung to the outside wall of the building to escape the flames. Fire authorities issued Response Level 1, Korea Economic Daily reported. The Sinmyeong Building, where the first fire broke out, and the Hanyang Building, where the second did, are a few minutes’ walk apart, and employees in the offices just before lunchtime fled in a rush down the stairs and out the windows, Kyunghyang Shinmun reported. Police began by checking whether the same person was behind both fires, Yonhap reported.

Police traced his movements by taxi, on foot and by subway and arrested a man in his 70s near Dongmyo Station in Jongno District, Seoul, at around 4:16 p.m., Yonhap and SBS reported. According to Yonhap, the man was taken to Suseo Police Station. Seoul Economic Daily reported that, asked about his motive by reporters, the man claimed a patent firm had defrauded him over a patent he filed in 2000 and said he had prepared the crime for three days. Yonhap and Korea Economic Daily reported that the man had been arrested 4 years ago for trying to set fire to the same building. Seoul Economic Daily reported that he served 2 years 6 months at the time for a case in which he threatened a patent firm with gasoline. The current condition of the patent attorney taken away in cardiac arrest has not been confirmed. Police are questioning the man about how the crime unfolded, why he chose the two buildings and where he obtained the flammable material, Yonhap reported. Whether an arrest warrant will be sought is not yet known.

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Economy · MarketsPress ✓ 3 outlets · final size of foreign net selling unconfirmed

KOSPI plunges 3.73% to close at 5,552.74… AI investment worries drag chip heavyweights down together

Yonhap reported that on the 20th the KOSPI closed at 5,552.74, down 215.27 points, or 3.73%, from the previous session. It slid as low as 5,493.24 during the session and gave back all of its gains from the past two days, Yonhap reported. The Kosdaq also fell 3.3%, Yonhap and SBS reported. The Korea JoongAng Daily reported that renewed worries over AI infrastructure investment led Samsung Electronics and SK Hynix lower. Bloomberg reported that Elice, an AI data center company that listed on the Kosdaq the same day, plunged on its first trading day. Invez reported that foreigners net sold 605.8 billion won in the morning alone. Yonhap reported that the National Pension Service’s stakes in Samsung Electronics and SK Hynix also shrank amid the recent sharp swings.

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By the numbers
5,552.74KOSPI close on Oct 20
−3.73%One-day drop (215.27 pts)
−3.3%Kosdaq drop

Politics · SecurityPress ✓ 4 outlets · no follow-up measure by North Korea confirmed

Joint Chiefs: “North’s brazen blame-shifting unacceptable”… JCS Chairman Jin Yeong-seung orders firm response to further provocation

The Joint Chiefs of Staff said on the 20th that North Korea is responding with brazen blame-shifting over our military’s legitimate operations and that it will respond firmly to any further provocation, Yonhap and Dong-A Ilbo reported. According to Kyunghyang Shinmun, JCS Chairman Jin Yeong-seung said he would not tolerate the North shifting the blame for rising tensions onto the South. Chosun Ilbo carried the same account. The Korea Times reported that the position responds to a North Korean statement issued the day before. The statement claimed that from August 1 to October 17 the South carried out 2,870 warning broadcasts and fired 201 rounds of warning shots (Korea Times). The Korea Times reported that the Defense Ministry explained it is making warning broadcasts with small speakers at guard posts, not with large loudspeakers. The Defense Ministry has halted large-loudspeaker broadcasts since June 11 on the order of President Lee Jae-myung, the Korea Times reported.

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Society · CourtsPress ✓ 2 outlets · whether bereaved families have filed a constitutional complaint unconfirmed

Aricell disaster that killed 23: Supreme Court finalizes 4 years for CEO Park Soon-kwan… reduction from 15 years at first trial stands

The Supreme Court First Division on the 20th finalized an appellate court ruling sentencing Aricell CEO Park Soon-kwan to 4 years in prison on charges including violating the Serious Accidents Punishment Act, Yonhap and Chosun Ilbo reported. According to the Korea Times, the 7 years in prison and 1 million won fine handed to his son, general manager Park Joong-eon, and the 800 million won fine on the company were also finalized. The first trial sentenced Park to 15 years, but the second trial found the related charge not guilty on the ground that there was no duty to provide an emergency exit on every floor and sharply cut the sentence, the Korea Times reported. The Korea Herald reported that bereaved families protested the Supreme Court ruling. The fire at a battery plant in Hwaseong, Gyeonggi Province, in 2024 killed 23 people. The Korea Times reported that the bereaved families are considering a constitutional complaint.

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Sports · BaseballPress ✓ 2 outlets · Playoffs schedule unconfirmed

Kim Do-young’s 145 m grand slam powers KIA past LG 13-1 for 3 straight wins… into Playoffs for first time in 23 years

The KIA Tigers beat the LG Twins 13-1 in Game 3 of the 2026 KBO League Semi-Playoff at Jamsil Stadium in Seoul on the 20th to advance to the Playoffs with 3 straight wins in the series, the Korea Times and Yonhap reported. Yonhap reported that KIA will take the Playoffs stage for the first time in 23 years. According to Chosun Ilbo, KIA scored 7 runs in the 2nd inning alone, including a solo home run by Na Sung-bum and a grand slam by Kim Do-young.

Kim Do-young’s grand slam traveled 145 m, tying the longest postseason home run on record, the Korea Times and KBS reported. The Korea Times reported that Kim hit 3 home runs and drove in 8 runs in the series and was named series MVP with 84 of 97 votes from the press corps. According to SBS, starter Keisho Shirakawa struck out 9 over 5 innings without allowing a run. LG ended its last fall baseball at Jamsil Stadium with 1 run.

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By the numbers
13-1Semi-Playoff Game 3 score
145mDistance of Kim Do-young’s grand slam
84/97Series MVP votes
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Unverified — what we could not confirm

The Yeoksam-dong arson killed several people The Korea Herald and Seoul Economic Daily reported 19 injured (5 seriously) and one patent attorney in cardiac arrest, and no report confirmed a death.
The KOSPI crashed by 7% on the 20th By Yonhap’s tally, the close on the 20th was 5,552.74, a drop of 3.73%. The 7% figure is mixed up with the market on another day.
The government is closing its Ukraine embassy entirely The Foreign Ministry decision is to withdraw ‘some’ embassy staff; consular and expatriate-support staff remain (Yonhap, Korea Times).

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Statements as posted, not fact-checked.

Glossary · dotted words — economics, law, security and science terms explained in the context of the story. The list grows every day.
INSIDESerial arson at 2 patent firms in Yeoksam-dong 7 minutes apart leaves 19 hurt… suspect in his 70s caught near Dongmyo StationSociety · CrimeKOSPI plunges 3.73% to close at 5,552.74… AI investment worries drag chip heavyweights down togetherEconomy · MarketsJoint Chiefs: “North’s brazen blame-shifting unacceptable”… JCS Chairman Jin Yeong-seung orders firm response to further provocationPolitics · SecurityAricell disaster that killed 23: Supreme Court finalizes 4 years for CEO Park Soon-kwan… reduction from 15 years at first trial standsSociety · CourtsKim Do-young’s 145 m grand slam powers KIA past LG 13-1 for 3 straight wins… into Playoffs for first time in 23 yearsSports · Baseball