An explosion occured in Iranian province of Ilam's Malekshahi County, which caused deaths of four people, Fars agency reported.
Reportedly, two more people got injured as a result of the blast, and were taken to the nearby hospital.
According to the police report, in one of the houses in the county, a family member accidentally pulled out the safety pin, causing the blast.
Police has said to carry out investigation. No further details of the incident were disclosed.