parcel bomb 
noun
An explosive device hidden in a package and sent with the intention of causing death or injury to the recipient.His body was found in a hotel toilet in the city of Kaduna with the remains of a parcel bomb after an explosion that no one heard....
- While some local sources have claimed that the woman was a suicide bomber, others have suggested that the minibus may have been destroyed by a parcel bomb placed under a female passenger's seat.
- An anti-EU anarchist group from Italy is believed to be behind the parcel bomb which blew up at the Radcliffe headquarters of MEP Gary Titley.