SEOUL – South Korean singer and actor Goo Hara, who died on Sunday in what appears to be another suicide case in the K-Pop industry, left a note described as “pessimistic,” according to the police.

The note – whose contents have not been revealed – was found on a table at Goo’s residence, the police said on Monday.

It has not yet been firmly established whether the artist wrote the document as a suicide note, a spokesperson for the National Police Agency said during a press conference.

“It was very short, which seemingly showed Goo being pessimistic about her life,” the spokesperson said.

Investigators have already ruled out murder but it remains unclear whether an autopsy will be carried out, as the decision will be taken after discussions between the singer’s family and representatives of the prosecutor’s office.

CCTV footage showed Goo returning to her residence in the Gangnam district shortly after noon on Sunday, about six hours before she was found dead.

Besides a private wake on Monday, a three-day public memorial is being held at Seoul St. Mary’s Hospital, located in the Seocho district of the South Korean capital.

Goo put her career on hold last year when her former partner, Choi Jong-bum, threatened to publish intimate videos after their breakup.

Choi never released the revenge porn videos but in August, he was still given a suspended prison sentence of one-and-a-half years for his threat.

In May, the singer was admitted in a South Korean hospital after she was found unconscious at her residence due to an alleged suicide attempt.

Goo started her career with all-girl band Kara in 2008, the year in which the group shot to fame.

The group – famous for songs such as “Wanna,” “Mister” and “Jumping” – also garnered a big following in the neighboring country of Japan. However, the members parted ways in 2016.

Goo had already debuted as a soloist in 2015.