Malaysian police have detained another 13 Muslim men suspected to be linked to the militant Islamic State group.

Head of the national police counterterrorism unit Ayob Khan Mydin Pitchay says the men were detained Tuesday in central Selangor state. He says further details will be released later.

Police last month picked up three Muslim men at the airport on suspicion of heading to Syria to join the Islamic State group.

Earlier this year, authorities detained 19 suspected militants for allegedly planning to carry out terrorist acts in the country and abroad. Seven have been charged so far and the rest released.

Prime Minister Najib Razak has said the arrests show the government is serious in routing out militants.