Lucknow, June 6: The Uttar Pradesh Police sounded a high alert across the state on Wednesday after a letter was received in the name of banned terrorist organisation Lashkar-e-Taiba (LeT) threatening bomb blasts at Krishna Janmabhoomi, Kashi Vishwanath temple in Varanasi, Hapur and Saharanpur railway stations, police said.Also Read - How 18 Travellers Were Trapped by Death in Barabanki Accident

The letter, the authenticity of which is being ascertained, threatens to blow up these prominent places on June 6, 8 and 10. Also Read - Barabanki Mishap: 18 Labourers Sleeping on Road Crushed to Death After Truck Rams Into Bus in UP

The Intelligence Bureau (IB) has sounded an alert following the letter and the state police has stepped up its vigil. Additional Director General of Police (Law & Order) Anand Kumar said that security has been beefed-up at important religious, tourist and public places. Also Read - Gangsters' Flats Worth Rs 1.90 Crore Attached in UP's Greater Noida

The letter has been signed by Maulana Ambu Sheikh, “area commander” of LeT in Jammu and Kashmir. There is massive security checking underway in the state capital.