MANILA, Philippines?Jailed Senator Antonio Trillanes spent P250,000 in travel expenses while languishing in prison on rebellion charges.

Trillanes, who stands accused of leading a failed 2003 coup against President Gloria Macapagal-Arroyo, was the fourth biggest claimant in the country's senate during 2008, auditors said.

Trillanes, who campaigned and won his seat in 2007 while detained at a police jail in Manila, billed taxpayers more than P17 million ($365,000) for the year, a Commission on Audit report said.

Local television quoted his chief of staff Reynaldo Robles as saying it was money well spent by his staff, who had conducted outreach and medical missions to depressed areas of the country on behalf of the jailed senator.

"It is a simple way of touching base with our poor constituents," Robles said, adding that the senator had managed to pass 10 laws in his two-and-a-half years in office, despite having been in jail throughout.

Trillanes is currently on trial.