Malang – Police are investigating an attack on the house of a local labor activist, Luthfi Khafid, 45, on Saturday.

Malang Metro police chief detective Adj. Comr. Hartoyo said Sunday investigations would center around any of Luthfi's enemies.

"As a labor activist, it's logical the victim has a lot of foes," Hartoyo said as quoted by detik.com. The police will also look into labor disputes that Luthfi has handled.

Luthfi, who chairs the local chapter of Solidarity for Indonesian Workers' Struggle (SPBI) had shots fired at his house by unknown assailants early on Saturday. No injuries were reported. Witnesses saw two assailants flee the scene.