K-pop sensation Goo Hara was found dead at her home in Seoul on Sunday evening, according to South Korean police, who said the exact cause of the 28-year-old’s death was still under investigation.

In May, Hara, a former member of the girl group Kara, was found unconscious after a suspected suicide attempt, The South China Morning Post reported.

In messages posted on social media, fans mourned Goo’s death, with one writing: “I hope you have a good sleep in heaven without any worries.”

This summer, she shared on her Instagram page a screen shot showing that she had signed with a Japanese management agency, Production Ogi.

She released a Japanese-language dance song called Midnight Queen this month, and announced on Instagram that she would tour the Japanese cities of Fukuoka, Nagoya, Osaka and Tokyo to promote the single.

Her last post on Instagram, where she had 1.6 million followers, was a photo from this weekend that showed her on a bed, staring into the camera. On her website, Hara, listed photography, reading and exercise as her hobbies, The New York Times reported.

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Her death is the latest among K-pop celebrities. In October, the actress, singer and former K-pop band member Sulli was found dead. Her manager found her while checking her home in Seongnam, South Korea. She was a member of the girl group f(x), which debuted in 2009, reported The Times.

In 2017, K-pop star Kim Jong-hyun, 27, committed suicide. He left a note saying that he had been depressed.

South Korea has one of the world’s highest rates of suicide which, according to recent government figures, is among the top causes of death for those under 40.

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– with reporting by AFP