By IANS

New York : Four days after he was found dead, it is still not clear why Indian student Akkaladevi Srinivas killed himself in Pennsylvania.

The police have already declared that the 29-year-old was not murdered but committed suicide.

"It is a case of suicide, not homicide," Detective Pat Tobin, a police officer, told IANS. A coroner confirmed this after a hearing.

It is, however, unclear why the deceased took the extreme step.

Srinivas, found dead Saturday in his apartment with multiple stab wounds to his neck, was doing a post-graduate's course in internal medicine at Mercy Hospital in Scranton Town in northeast Pennsylvania.

Pardeep Bansal, a friend and colleague of Srinivas, told IANS that the knife wounds revealed repeated suicide attempts.

"A note found scribbled on a mirror in Srinivas' apartment said he was taking his own life. His death was not due to girlfriend related troubles or depression," Bansal said.

Srinivas had been dead 48 hours when his body was found in a locked residence, Bansal said. Srinivas was unmarried and lived alone, Bansal added.

The Cincinnati, Ohio-based relatives and about 50 colleagues of Srinivas attended his memorial service Tuesday.

Srinivas's body is being flown back home to Hyderabad Wednesday.

Srinivas went to the US for higher studies in 2002 after graduating in medicine from Gandhi Medical College, Hyderabad. Following the completion of his master's degree, he relocated to Scranton.

This is the fourth instance of NRI students' unnatural death in the US in the last three months.

While two medical students from Andhra Pradesh were murdered at the Louisiana State University Campus in Baton Rouge, an engineering graduate from Jharkhand was killed in a robbery at North Carolina's Duke University.