Lee Sun-kyun, a South Korean actor known for his role in the Oscar-winning film "Parasite," has died. He was 48. 

Authorities confirmed that Lee was discovered dead in a car in Seoul on Wednesday, after weeks of an intense police investigation into his alleged drug use, according to The Associated Press. 

After police received reports that the actor had been missing, they were on the hunt for Lee. 

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Actor Lee Sun-kyun

Actor Lee Sun-kyun gets out of a car upon his arrival at the Incheon Metropolitan Police in Incheon, South Korea, on Saturday. (AP Images)

Police and emergency officers initially found Lee in what they believed was an unconscious state in a car parked on a street in northern Seoul. Emergency officers later confirmed he was dead, according to Seoul’s Seongbuk police station.

Although authorities did not confirm whether the death was a suicide, South Korean media outlets, including Yonhap News Agency, said that Lee’s family reported to police that he left home after leaving a message similar to a suicide note early Wednesday.

Ahead of his death, the "Parasite" actor was involved in a police probe, as he allegedly used illegal drugs at the residence of a bar hostess. 

Lee Sun-kyun, Kim Hee-wonJu Ji-hoon

From left: Lee Sun-kyun, Kim Hee-won and Ju Ji-hoon pose for photographers at the photo call for the film "Project Silence" at the Cannes Film Festival in Cannes, France, on May 22. (AP Images)

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He filed a suit against two people, including the hostess, and alleged they blackmailed him, according to the media outlet. 

Lee insisted he was tricked into taking the drugs, including marijuana, by a hostess at a high-end bar in Seoul and that he did not know what he was taking, according to Yonhap.

Despite being blackmailed, Lee passed two drug tests during the investigation and also submitted to a polygraph test to prove his innocence, as he claimed the hostess was lying in the scheme.

When Lee was first summoned for questioning at a police station in Incheon, a city near Seoul, in late October, he bowed deeply several times and apologized to his fans and family. 

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"I feel sorry to my family members who are enduring too difficult pains at this moment. I again sincerely apologize to everyone," he said.

Lee was reportedly questioned multiple times by authorities during the investigation, in addition to 19 hours of questioning over the weekend, according to Yonhap.

Incheon police said Wednesday they would end their investigation of Lee's drug use allegations but would continue to investigate the two people Lee had sued.

Members of the Korea Crime Scene Investigation team

Members of the Korea Crime Scene Investigation team investigate the scene where South Korean actor Lee Sun-kyun was found unconscious in Seoul. (AP Images)

Lee starred in "Parasite," portraying the head of a wealthy family. In 2020, "Parasite" won the best picture Oscar at the 92nd annual Academy Awards. The film from South Korea won a total of four Oscars and made history as the first non-English language film to take home the night's highest honor.

The movie, on its surface, is a dark comic thriller about family, class and capitalism.

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Lee Sun-Kyun

Lee Sun-Kyun attends the screening of "Parasite" during the 72nd annual Cannes Film Festival on May 21, 2019. (Getty Images)

The film’s cast, including Lee, additionally won a Screen Actors Guild Award for the best motion picture ensemble cast in 2020. He also was nominated for best actor at the International Emmy Awards for his performance in the sci-fi thriller "Dr. Brain" in 2022.

Before "Parasite," Lee had been a longtime popular actor in South Korea. He rose to stardom for his role in the hit TV drama series "Coffee Prince," and gained mainstream popularity with a series of hit TV dramas such as "Behind the White Tower," "Pasta" and "My Mister."

Lee is survived by his wife, actress Jeon Hye-jin, and two sons.

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The Associated Press contributed to this report.