Scores of suspected Moro militants knocked down a concrete wall and barged into a jail in Basilan Sunday, freeing 31 inmates in a nighttime attack that sparked a gunbattle in which two people were killed, officials said. Vice Governor Al-Rasheed Sakalahul of Basilan island said 70 heavily armed men cut through padlocks with boltcutters after using a sledgehammer to destroy the wall at the provincial jail in Isabela City to free several detained guerrillas. Other inmates also dashed to freedom, he said. The daring assault sparked a brief clash that killed one attacker and a jail guard. The attackers and prisoners fled in several vehicles toward Basilan's jungle-covered mountainous heartland, Sakalahul said. At least 31 inmates escaped, including suspected militants from the Moro Islamic Liberation Front, a large rebel group engaged in peace talks with the government, and the smaller but more violent Abu Sayyaf group, which has been linked to Al-Qaida, regional military commander Maj. Gen. Benjamin Dolorfino said. Among those who escaped were two Moro rebels accused of beheading 10 Marines during a 2007 clash, national police spokesman Chief Supt. Leonardo Espina said. “All these are high-risk prisoners,” Sakalahul said, adding that troops were closing in on some of the fleeing inmates. Military checkpoints were set up in Isabela, the provincial capital, and nearby municipalities, Dolorfino said. The rundown provincial jail has had a history of jailbreaks. Three Abu Sayyaf militants, also accused of beheading the 10 Marines, escaped in December last year after overpowering their guards. At least 16 people, including four Abu Sayyaf members, escaped in 2007. In the biggest jailbreak, 53 of the jail's more than 130 inmates overpowered their guards using a smuggled pistol and fled in 2004. Nineteen Abu Sayyaf members were among those who escaped, police said. Sunday's jail attack was the latest violence in the southern Mindanao region, scene of a decades-long Moro separatist rebellion. It occurred hours before Defense Secretary Norberto Gonzales and military chief of staff Gen. Victor Ibrado flew to Basilan, a predominantly Moro island, to meet Roman Catholic church leaders who have appealed for martial law to be declared in the province amid recent kidnappings blamed on Moro militants and the beheading of one hostage.