Ferozepur / Amritsar (Punjab), Oct 20 : Railway authorities in Punjab have tightened security on all railway routes across the state following receipt of a letter from the Pakistan-based Lashkar-e-Toiba (LeT).

The letter was mailed to the office of the Divisional Railway Manager (DRM) of Uttar Pradesh, and it threatened to blow railway stations in Punjab and Jammu and Kashmir.

A Punjab police official in Ferozepur District said the antecedents of the letter are being verified, and no chances are being taken.

"We have called for a meeting with the Railway Protection Force (RPF) and all  senior station officers. We have installed metal detectors and undertaken all precautionary steps," claimed Paramjit Singh Parmar, Deputy Superintendent of Police (DSP).

Punjab Chief Minister Parkash Singh Badal has asked investigators not to jump make unsubstantiated statements.

Without naming any of the terrorist outfits, Badal said the police is working on several theories but has not got clues about the outfit that was behind the recent blast in Ludhiana.

The chief minister also assured the people of state that there was no room for terrorism in the state.

Police are on their toes after last Sunday's blast at a cinema hall in Ludhiana in which at least six people were killed and 20 others injured.

The multiplex Shingar Cinema, was packed with about 600 people, mostly labourers from Uttar Pradesh and Bihar.

The blast coincided with the Eid festival. (ANI)