Security has been tightened at the Chhatrapati Shivaji International airport, railway stations and other vital installations here following an alert issued by Central security agencies about a possible terror strike in the city.

Bureau of Civil Aviation Security (BCAS) and the City Police received inputs from Delhi Police and other Central intelligence agencies stating that there could be a "suspected terror attack" on April 22 at the airport, officials said.

Besides, one of the malls in suburban Lokhandwala area and Santacruz railway station are also on the list of targets, they said.

"Following the twin blasts in Bangalore, the city has been kept on alert and security was increased at the railway stations and other vital installations. Threat perception is always there in the city. Alerts are being received on a regular basis," a senior police official said.

In the wake of constant alerts about terror threats in the city, Maharashtra DGP A N Roy yesterday reviewed the security arrangements for IPL matches to be held at D Y Patil Sports Stadium in Navi Mumbai.

Responding to a query, Roy had said, "It is clear from the fact of explosions in Bangalore that IPL is on their (terrorists) target list. Keeping this in mind, the required number of police deployment has been made at the venue.