(Lakes of the Four Seasons, IN ) - Authorities have identified a Northwest Indiana man killed by a hand grenade.

47-year-old Bryan Niedert was from Lakes of the Four Seasons. The community of more than 7,000 residents is west of Valparaiso and east of Merrillville.

The investigation shows Niedert and members of his family were searching through their grandfather’s belongings when they reportedly found a hand grenade, which detonated, killing Niedert and leaving his two teenage children with injuries from shrapnel.

Police are currently investigating whether one of the family members pulled the pin on the grenade.