An explosion occurred in front of a man's house, causing ...

An explosion occurred in front of a man's house, causing material damage to the house and the surrounding buildings. The police found a burnt car, suspected to have been used by the perpetrator(s) to flee the scene. The police suspect that the primary motive for the incident was revenge, due to the fact that the son of the house owner is convicted for murder. The case is under investigation and it is thought that more than two perpetrators were involved.