Malaysian authorities say already tight security has been increased at and near the venue of the ASEAN summit following a reported, but unconfirmed, terrorist threat.<br />At least 2,000 army personnel are stationed in Kuala Lumpur and another 2,500 are on standby, according to General Zulkifeli Mohd Zin, chief of Malaysia's defense forces.<br />Outside the Kuala Lumpur Convention Center, the main venue for the summit, police are posted in tandem with red beret Malaysian paratroopers armed with M4 carbines.<br />U.S. President Barack Obama, one of 18 leaders expected to join the meetings, is scheduled to arrive in Malaysia aboard Air Force One on Friday afternoon after a flight from Manila where he attended the APEC summit.