A Philippine senator leading an investigation into a former mayor's alleged links to Chinese criminal syndicates said on Friday she would not rule out her possible involvement in espionage.

Dismissed Bamban, Tarlac Mayor Alice Guo, also known as Guo Hua Ping, returned to the Philippines on Friday morning, Sept. 6, after being apprehended by authorities in Tangerang City, Indonesia.

Justice secretary cites alleged lapses of immigration bureau under watch of Tansingco, the latest involving former mayor Guo.

Former Philippine town mayor Alice Guo was held in contempt for a second time on Monday after refusing to answer senators' questions on suspected ties to Chinese criminal syndicates and how she escaped the country two months ago.

Dismissed Philippine mayor Alice Guo has been cited in contempt for a second time for allegedly continuing to lie before the senate. Investigations into her purported criminal ties have resumed, days after her arrest and deportation from Indonesia.