Flag carrier Air India on Thursday said it has received an e-mail threatening to blow up Mumbai's Chhatrapati Shivaji International Airport (CSIA). "The matter was reported to the police for investigation. We received the e-mail threat on a few of our mail Ids," an airline spokesperson said in New Delhi.

The e-mail, which was received on Monday, was apparently sent from Rawalpindi, sources said.

"We have forwarded the e-mail to the Mumbai police for investigation," the spokesperson said, declining to share details of its contents.

The spokesperson, however, denied that the the e-mail also threatened to blow-up the airline's headquarters at Nariman Point in Mumbai.

On Sep 14 last year, a day after serial blasts in the national capital that claimed 26 lives, an Air India call centre here received a threat that the airline's Mumbai headquarters would be bombed.