Intelligence agencies on Friday sounded a terror alert in Kolkata, Mumbai and Delhi following reports that terrorists had sneaked into these cities to target vital installations.
Home ministry sources said that Taliban-trained 'fidayeen' (suicide squads) had reportedly entered the country
to carry out attacks at specific iconic structures.
Barely a fortnight back, there was a similar alert saying that 'Pashtun-looking' suicide bombers, trained by Taliban, had entered India to launch a fresh wave of attacks.
Security has been beefed up at key installations and patrolling has been intensified in market places, railway stations, airports and hotels, sources said.