MANILA: The five main Philippine presidential candidates faced off for the first time in a national debate Sunday, vowing to fight corruption and crime if they succeed President Benigno Aquino.

The televised debate was the first in a series aimed at focusing the contest on policy issues, rather than the colorful personalities running in the May presidential election.

But candidate Rodrigo Duterte played up his image of ruthlessness, as he vowed he would wipe out crime, illegal drugs and corruption in just three months by ordering authorities to kill criminals.

“If I become president, it will be bloody because I will order the killing of all criminals,” said Duterte who has been accused of abetting death squads as longtime mayor of the southern city of Davao.

The debate, held on the strife-torn southern island of Mindanao, brought together the top contenders seeking to succeed Aquino who is limited by law to one six-year term.

Polls show the frontrunner is Vice President Jejomar Binay, political kingpin of the financial center of Makati.

Tied for second are Duterte and Senator Grace Poe, the adopted daughter of popular movie star Fernando Poe Jr..

Aquino’s chosen successor, former interior secretary Manuel Roxas, trails behind them with Senator Miriam Santiago in fifth place.

Roxas, who suffers from a colorless image, took the offensive, stressing the need to maintain Aquino’s “straight path” policies that are credited with combating corruption and spurring economic growth.

“That is what the straight path has delivered and that is what I will continue,” Roxas told a crowd of civic leaders and journalists.

He also questioned Duterte’s temper, Poe’s experience and accusations of corruption that have dogged Binay.

“Becoming a president is not OJT (on the job training),” he said in a swipe at Poe.