MANILA -- A grenade exploded inside a cement warehouse in Zamboanga City early Wednesday morning, police said.
A grenade exploded inside a cement warehouse at the construction site of Citymall along Don Alfaro Street in Tetuan, Zamboanga City.
No one was reported hurt in the incident.
Authorities recovered the safety lever and fragments of a suspected MK2 grenade at the scene.
Investigation on the incident is still ongoing.