POSO, Indonesia – The police bomb squad in Central Sulawesi safely detonated a homemade bomb Tuesday morning (October 23rd), local media reported. It was found by a student waiting for a public bus to take him to his Poso junior high.

The explosives were inside a paint can wrapped in black duct tape. Investigators credit the boy for reporting what he had seen to a village leader in Tonipa, where police were alerted, according to The Jakarta Post.

Poso Police Chief Eko Santoso later said the bombers would likely have used a cell phone to set off the explosive.

On Monday, a bomb exploded at a police post in Kasintuvu, Poso, injuring two police officers.