"An input has been received which says that more than three terrorists in three different vehicles carrying ammunition are travelling from Jammu and Kashmir to go towards Delhi via Punjab," a Punjab police official said today.
After receiving the alert, the police have tightened security across the state.
Police have been asked to strictly check vehicles, enhance security of vital installations including police and defence establishments, religious places, markets, malls, railway stations and tracks, and educational institutions, the official said.
In January this year, terrorists had attacked an air force base in Pathankot, killing seven military personnel. In July last year, the state had witnessed an attack in Dinanangar in Gurdaspur district bordering Pakistan.
