Markus Makur, Jayapura – The Papua Police Office has handed over to the Timika Prosecutor's Office dossiers of seven people accused of being involved in a riot at the US-mining giant PT Freeport Indonesia that claimed the lives of at least two workers.

The Office Spokesman Snr. Comr. Agus Rianto said on Thursday that the seven suspects would later undergo trial processes at Timika District Court to prove their roles in the murder of the firm's security workers and the ambush of the firm's bus.

"Meanwhile, we keep on hunting for the killer of Australian worker Nicholas Grant," Rianto said.

He added that his office had increased the number of its personnel up to 600 to safeguard daily activities of the company and anticipate possible similar attacks.