Local authorities detained four people in connection with Thursday’s grenade attack on the Dole Philippines Inc. property in the pineapple plantation town of Polomolok, South Cotabato, a military report here said.
The blast damaged a water main but there were no casualties.
Military officials said the Pentagon, a gang of ex-Muslim separatist guerrillas included on Washington’s blacklist of foreign terrorist organizations, is suspected of involvement.
In January, two Pentagon members were killed in a foiled attack on the plantation home of Dole Philippines regional director Christopher Hubbard.
Dole Philippines is a unit of Dole Foods Co. – AFP