A man in Northwest Indiana is dead after a grenade blew up his house.

According to the Lake County Sheriff’s Department, police responded sometime before 6:30 PM to a reported explosion in a home in the 3400 block of West Lake Shore Drive. According to the police, the family in the home had been going through a grandfather’s belongings when they found a hand grenade, and someone reportedly pulled the pin on the device and it detonated.

No other information is available at this time.