Yogyakarta – The provincial police named on Tuesday two other policemen as suspects in the death of Aan Yulianto who died in the hospital after having been "interrogated" in relation to a brawl early this month.

Spokesman for the Yogyakarta police office Adj. Sr. Comr. Sudarsono said the new suspects are Joko Taruno and Adhofir.

"I need to assert that the police are very serious about this the case. We guarantee that any of our personnel proven guilty will be punished," he said here on Tuesday. The police also named the other two policemen, including Soleh, as suspects in the same case.

Aan was one of the five witnesses questioned for his alleged involvement in a melee that took place on Jl. Magelang. The clash left police Mobile Brigade member Totok Sugiarto wounded after being stabbed by an unidentified assailant.

Doctors said Aan died after incurring serious injuries to his lungs and liver. Several of his ribs were also broken. Aan's relatives have filed a complaint with the police over the death.