SEOUL (THE KOREA HERALD/ASIA NEWS NETWORK) - Gyeonggi police searched South Korean singer-actor Park Yoo-chun's home and took hair samples on Tuesday (April 16) in a drug probe that started when his ex-girlfriend accused him of using illegal drugs.

The Gyeonggi Nambu Provincial Police Agency drug squad said 11 investigators had raided Park's residence in Hanam, Gyeonggi Province, and confiscated his cellphone and car, a day before Park's scheduled appearance for police questioning on Wednesday.

In spite of Park's denials, the police found his ex-girlfriend's testimony credible after obtaining surveillance camera footage from her former residence in Gangnam taken earlier this year showing Park on the premises.

During the police investigation, Park's ex-girlfriend Hwang Ha-na testified that she and Park had used drugs together earlier this year at her home and also alleged that Park had injected her with methamphetamine while she was asleep.

Hwang, the granddaughter of the founder of a leading South Korean dairy company, was arrested earlier this month on charges of illegal drug use and the prosecution has taken over her case.

Hwang and Park announced their engagement in April 2017, but broke up in September of the same year.

"Park Yoo-chun will voluntarily appear at the Gyeonggi Provincial Police Agency at 10am on April 17 for police questioning. Although Park Yoo-chun has already said that he has not used drugs in the press conference held on April 10, he will sincerely undergo police investigation," said Park's legal representative Kwon Chang-bum.

Last week, Park vigorously denied the allegations, saying, "I did not use drugs and I did not induce drug use. I was scared when I came across reports that Hwang Ha-na pinpointed a celebrity as having suggested drug use."

Park has said Hwang threatened him after their breakup.

The latest case involving Hwang, who has made a name for herself as a social media influencer with a luxurious lifestyle, has prompted a new wave of public anger against the police after what many viewed as lenient treatment when she was the subject of an earlier drug investigation in 2015.

The prosecution faces fierce backlash for dropping charges against Hwang in 2015, even though an undergrad student surnamed Cho who had used drugs with Hwang was sentenced in 2016 to two years and six months behind bars, with a stay of execution for three years.