K-pop singer Sully is found dead at the age of 25.
Sully, the real name Choi Jin-ri, was discovered at a house in Sungnam, Gyeonggi province on Monday, the Korean news agency Yonhap reported.
Local police said Sully was found by her agent at the residence at 15:21 local time. Police believe the singer may have died from suicide, according to Jonhap. Korea Herald reports that an agent visits Sully's house on Monday after worrying that he could not be contacted after their last telephone call Sunday night.
"It looks like Choi was living alone in the house. She seems to have taken her own life, but we are looking at other options as well," said a police officer.
K-pop singer Sully is found dead
Sully was born in Busan, South Korea and first gained fame in 2005 as an actress in a television drama The Ballad of Sedong .
In 2009, Sully became a member of the K-pop girls group f (x), which was composed by SM Entertainment.
In July 2014, Sulli took an extended break from f (x) and the entertainment industry entirely after suffering from "stress-related stomach aches", which SM Entertainment attributed to rumors about her private life circulating online.
"We are sorry to give f (x) fans this kind of news, but ask for continued support and love for f (x)," says SM Entertainment at the time.
"Because she suffers physically from her discomforts. and psychologically from the malicious and false rumors spreading about her, Sully wanted to rest from all the entertainment activities. After careful consideration, the agency decided to minimize its activities and give it a break regarding its wishes and protect our artists. "
Sully left f (x) in August 2015 and recently pursued a solo career.  Last year, Sulli starred in the song" Dayfly "but the South Korean singer Dean. In June she released her own solo song" Goblin ".
Fans mourned the death of Sully on Twitter.
"Condolences to Sully's family and friends and our dear angel to rest in peace. You have taken part of our hearts and you will never be forgotten, "said a fan.
" You are just an angel who wanted to go home and I hope that you will no longer feel pain and only the greatest happiness. We love you. "
Another fan said:" Hearing the news that Sully has left us is heartbreaking. She smiles and struggles her way through their struggles "
If you have thoughts of suicide, confidential assistance is available free of charge at the National Suicide Prevention Line. Call 1-800-273-8255. The line is available 24 hours a day.