Police sources said the airline office received a call claiming one of the passengers on the Kuala Lumpur-Delhi flight, Abu Suwaif, was a 26/11 suspect. Suwaif was released on Tuesday after detailed interrogation; the police are now trying to trace the hoax caller.

“After receiving the call, Malaysian Airlines alerted all security agencies in India: the Central Industrial Security Force (CISF), Bureau for Civil Aviation Security, Delhi Police and the Immigration,” a CISF official today said. “Flight MH 184 landed in Delhi airport at 11 am Monday and was parked at Bay 46 in isolation. Officials from all security agencies were present and the passenger was identified and detained for questioning.”