Fatal grenade explosion in Indiana home leaves one dead and two injured.

A man identified as Bryan Niedert died and his two teenage children were injured after a hand grenade detonated at their home in Lakes of the Four Seasons, Indiana. The family found the grenade while going through a grandfather's belongings. The Porter County Bomb Squad was called to secure the area and determine whether there may be other explosives. The Lake County Sheriff's Department Homicide detectives and CSI unit are investigating.