Malaysian authorities have arrested six local men for suspected involvement with the Islamic State militant group, police said on Saturday. Muslim-majority Malaysia has been on the watch for Islamic State-linked militants since an attack last year by the group in Jakarta, the capital of neighbouring Indonesia. Inspector-general of police Khalid Abu Bakar said in a statement that the six suspects were detained from separate raids in four states from May 23-26. One of the arrests involved two brothers – a religious school teacher and online businessman – under suspicion of helping the militant movement in Syria. The brothers are relatives of Muhammad Fudhail Omar. He is expected to take over the role of the former top Islamic State operative Muhammad Wanndy Mohamed Jedi who was on a US list of global militants until his death, Khalid said. Wanndy was the alleged mastermind behind a grenade attack on a Kuala Lumpur bar last June which injured eight people. It was the first and so far only Islamic State attack that caused casualties in Malaysia Media agencies