The Bruno Manser Fund is willing to share with the new Malaysian government evidence of the alleged corrupt activities of Sarawak's former chief minister and current governor Abdul Taib Mahmud.

In a statement today, the Swiss-based NGO's executive director Lukas Straumann said it is hoped that the MACC and the Attorney-General's Chambers would soon reopen files on the allegations against Taib.

"The Bruno Manser Fund is willing to share with the new Malaysian government the results of a seven-year evidence-gathering process on the alleged corrupt practices by Taib Mahmud.

"The investigation should focus on the alleged allocation of state land to Taib family members and on the Taibs' unexplained wealth overseas," said Straumann.

He was referring to Prime Minister Dr Mahathir Mohamad's recent remark that those with evidence of corruption in Sarawak should come forward with it so that the authorities could act.

The premier was responding to National Human Rights Society (Hakam) chairperson Ambiga Sreenevasan's statement that the new Pakatan Harapan government should investigate Taib over alleged corruption in Sarawak during his 33 years of ruling the state.

Taib had been accused by international environmental groups of exploiting Sarawak's natural resources including widespread logging which is said to have stripped the state of huge portions of its rainforests.

He is also speculated to be among the world's richest with business interests in a variety of industries locally and abroad.

Taib's meeting with Mahathir last Friday, shortly after the latter assumed office, sparked rife speculation that the ruling party in Sarawak, Taib's PBB, may review its position in BN.

Straumann also reminded that a letter penned by his organisation in collaboration with other international NGOs in December 2011 was still unanswered by the Malaysian authorities.

The letter had sought for Taib to be arrested and prosecuted for "conspiring with his family members to steal Sarawak state assets and lands."

"In the course of its Stop Timber Corruption campaign, the Bruno Manser Fund has since 2011 identified over 400 companies in 25 jurisdictions with links to the Taib family," said Straumann.