A special Indonesian military unit Kopassus has joined the police in cracking down on terrorist cells amid a recent wave of suicide bombings in the world’s most populous Muslim nation. Tito Karnavian, the head of the national police said Kopassus has joined his force since Tuesday. On Sunday, a six-member family carried out suicide bomb attacks on three Christian churches in Surabaya, Indonesia’s second-largest city, killing 13 other people as well. The following day, a five-member family carried out a suicide attack on the police headquarters in Surabaya, four died but a 7-year-old daughter survived. The bombings occurred after a series of attacks on police near the national capital Jakarta days earlier.