Police are monitoring the movement of 59 Malaysians who joined the Daish militants abroad following the possibility of them returning after the coalition military forces attack on the Daish stronghold in Mosul, Iraq, on Monday.

Bukit Aman Special Branch director Datuk Seri Mohamad Fuzi Harun said the police would not allow Daish militants to leave and enter the country with impunity.

"We have been monitoring Daish militants no matter from Malaysia or outside the country.

"If they try to enter the country, the police will be able to detect and arrest them immediately," he told Bernama here Tuesday.

He said this when asked to comment on measures taken by the police following the possibility that some Daish militant members, including from Malaysia attempted to return to their homeland after the attack by allied forces.

Mohamad Fuzi said the government also cancelled all the passports of Malaysians joining the Daish activities recently.

"This measure made it difficult for them to return and if they try to do so, of course, they will be detained in other countries," he said.

Asked about the possibility of militants attempting to enter the country illegal, he said the police were cooperating closely with the authorities nationwide to ensure it did not happen.

"We have intelligence that we can trust and will know if they try to return illegally," he said.

On Monday, Defence Minister Datuk Seri Hishammuddin Hussein was reported to have said Malaysia closely monitored the attack by coalition forces led by the United States on the Daish stronghold in Mosul, Iraq.

Media reports said Iraq Prime Minister Iraq Haider al-Abadi announced the coalition military forces attack led by the US to recapture the Daish government centre in Mosul. -- Bernama