KUALA LUMPUR (THE STAR/ASIA NEWS NETWORK) - Three suspected terrorists have been detained in Kuala Lumpur following a terror alert issued by the US embassy.

The three - a Malaysian, a Syrian and an Indonesian - were picked up by the Bukit Aman Special Branch Counter Terrorism Division on Thursday (Sept 24).

Deputy Inspector-General of Police Datuk Seri Noor Rashid Ibrahim said the police acted fast in detaining the suspects after the terror alert was issued.

"We are investigating the involvement of the suspects in a supposed terror threat in Jalan Alor.

"It is still too early, so give us time," he said when contacted on Friday (Sept 25).

Noor Rashid said Bukit Aman had cooperated with counterparts from other countries in obtaining vital information that led to the arrests of the trio.

They have been detained under the Security Offences (Special Measures) Act 2012.

"We are on top of things. We will never let any attack occur in Malaysia," he said.

On Thursday, the United States Embassy and the Australian High Commission here were reported to have issued a travel advisory on the possibility of terrorist attacks in Jalan Alor near Bukit Bintang and its surrounding areas.