Military police on Sunday arrested a man suspected of being involved in an October grenade attack at a grocery shop in Phnom Penh’s Sen Sok district that left an 11-year-old boy dead and five others injured, police said yesterday.

Phan Daravuth, deputy chief of the research bureau at the Phnom Penh military police headquarters, said yesterday that he could not reveal the identity of the suspect as authorities are still searching for another man implicated in the attack.

“Please understand. We are still investigating more,” he said.

On October 9, at around 6:45pm, two men riding a red motorbike drove past the home of Sin Seav, daughter of presumed target Sin Sorn, police said at the time.

A few moments later, the men rode past again, pausing to lob the grenade towards where Sorn and others were having dinner.

A parked truck largely shielded Sorn, 58, and the other four injured – who included the owner of a nearby coffee shop and another young boy. However, the truck also diverted fragments of shrapnel towards the entrance to the home, where 11-year-old Sin Dara was standing. Dara later died in hospital.

Seav, Sorn’s daughter, said at the time that she was unaware of any reason someone may have wanted to kill her father.