MANILA - The National Bureau of Investigation (NBI) on Tuesday arrested former Presidential Commission on Good Government (PCGG) chairman Camilo Sabio over charges of graft, malversation of funds and corrupt practices pending at the Sandiganbayan 4th and 5th Divisions.

NBI arrests ex-PCGG Chair Camilo Sabio for standing warrant on malversation of funds & violation of anti-graft & corrupt practices|@Nikobaua pic.twitter.com/FwnpfOuio5

— ABS-CBN News (@ABSCBNNews) September 19, 2017

The arrest took 82-year-old Sabio by surprise as he said he did not receive a subpoena or any prior notification. Assisted by wife Marlene, Sabio was booked at the NBI in Manila Tuesday afternoon.

"I did not know about this case. Baka nakalimutan nila," he told reporters.

"I am confident that I can be freed. My record has always been clean," he added.

The NBI said it acted upon a warrant of arrest and does not possess a copy of the case against Sabio.

The former PCGG chairman will be detained at the NBI until he can post an P80,000 bail at the Sandiganbayan.

Sabio's arrest followed his conviction in a separate case in June, where the Sandiganbayan sentenced him to 12 to 20 years in jail for 2 counts of graft for the alleged anomalous lease of vehicles in 2007 and 2009.

Sabio's conviction stemmed from the PCGG's rental of 11 vehicles in 2007 and 2009 for P12.66 million, some of which he and several other agency officials used.

The Office of the Ombudsman had charged Sabio and 4 others with graft in 2011 for supposedly failing to hold a bidding process for the contracts.

Also tagged in the charges were former PCGG commissioners Tereso Javier, Narciso Nario and Nicasio Conti. Another accused, former Commissioner Ricardo Abcede, passed way in 2012.

In July, Sabio appealed his conviction. The status of his appeal has not been released.

-- Report from Niko Baua, ABS-CBN News