Islamabad, Jan 21 (IANS): A senior Pakistani officer, who was investigating a case against Pakistan Prime Minister Raja Pervez Ashraf and was found hanging Jan 18, was even prepared to quit his job, a media report said Monday.

Kamran Faisal, an assistant director with the country's anti-corruption agency, National Accountability Bureau (NAB), was in the team probing the Rental Power Plants (RPP) case.

Pakistan's Supreme Court Jan 15 ordered the arrest of Prime Minister Ashraf over his involvement in the corruption case.

Ashraf was accused of violating rules in rental power projects when he was minister for water and power.

Geo News reported that Faisal was deeply disturbed on being assigned the case and he was even ready to resign.

"He said he will quit if his application for a transfer is spurned," said Faisal's cousin Tayyab Usman in Mian Channu, a town in Pakistan's Punjab province.

He said that days before his death, Faisal had spoken of his concerns over this high profile case that involved the prime minister of the county.

He quoted Kamran as saying he was entangled in a case of serious nature and wanted himself out of it.

Initial report has cited that the cause of Faisal's death was suicide. However, his relatives claim that he was murdered.

His relatives alleged that torture marks were found on his body.

The apex court had ordered the prime minister's arrest along with 16 others - former ministers and officials involved in the projects.

It also asked the anti-corruption panel to ensure that no one flees the country.

The apex court in its earlier verdict in March 2012 had observed that rules and regulations were violated in the projects due to which the national exchequer witnessed losses worth billions.

The court has declared the rental power projects illegal and also ordered them to be shut down.