TEMPO.CO, Jakarta - The Transportation Ministry will conduct random checks on cars entering major airports, especially the Soekarno-Hatta International Airport. Transportation Minister Budi Karya Sumadi said the checks were aimed at anticipating terror attacks in the wake of suicide bombings in Surabaya and Sidoarjo recently.

"We will conduct random checks on cars entering major airports," Budi Karya said on Monday, May 14.

The checks will be conducted by the airport's security personnel as well as the police and the army. Officers will tightly monitor everyone entering the airports as well.

"We have closed security system conducted by the military and police; overseeing all suspicious people," said Budi Karya.

Read: Surabaya Bombing Aftermath; West Java on High Alert

Three churches in Surabaya were bombed on Sunday morning; the Indonesian Christian Church (Gereja Kristen Indonesia) on Jl. Diponegoro, the Santa Maria Catholic Church on Jl. Ngagel Madya, and the Pentecostal Church on Jl. Arjuno.

The bombings in Surabaya's churches on Sunday were said to have been committed by a family who were members of the Jamaah Ansharud Daulah (JAD) network.

"They were all suicide attacks, but the types of bombs used were different," Police chief Gen. Tito Karnavian said in Surabaya, Sunday.

Later in the evening, an explosion occurred at one of the units at the Wonocolo low-cost apartment in Sidoarjo, killing three out of the six members of a family who were injured by the blast.

ZARA AMELIA