The ongoing corruption investigation against Annuar Musa has punctured holes into Umno secretary-general Tengku Adnan Tengku Mansor's claim that the party does not practise corruption, PAS deputy president Tuan Ibrahim Tuan Man said.

"Those watching the video (of Tengku Adnan's statement) could only laugh then, but we can now say the reaction has basis, after MACC's probe into Annuar lays to question Tengku Adnan's claim," Tuan Ibrahim added in a statement today.

Yesterday, the MACC said it is investigating Annuar, who is also Umno information chief, following his suspension as chairperson of Majlis Amanah Rakyat (Mara).

Tengku Adnan, who is often referred to as Ku Nan, made the statement last week, after the Malaysian Anti-Corruption Commission (MACC) warned that politicians are in its crosshairs.

MACC chief commissioner Dzulkifli Ahmad also vowed that the commission would ensure at least one anti-corruption arrest or prosecution a week in 2017.

However, Tuan Ibrahim said anti-corruption performance should be measured not by the number of arrests but by the number of those convicted of the crimes involved.

This, he said, would lie in the hands of the Attorney-General's Chambers, which has the prosecution powers that the MACC lacks.

He said failure to secure convictions in high profile cases, such as the Port Klang Free Zone (PKFZ) and National Feedlot Centre cases, plus zero prosecutions in the SRC International and 1MDB cases, raise doubts on Malaysia's ability to stamp out corruption.

Without high profile convictions, Tuan Ibrahim said, Malaysians would continue to question major MACC arrests.