PTI By

NEW DELHI: Security was stepped up in and around Delhi Secretariat and the Chief Minister's residence after police received a call this evening in which a man threatened to "blow up" Arvind Kejriwal.

The police conducted a thorough check at both the locations and later declared it a hoax call.

"The control room received the call at around 4.30 PM and the caller told the police to do whatever they can to save Kejriwal and that he would blow him up in an hour," a senior police official said.

The alert was forwarded to Delhi Police's Central district, under which the Secretariat comes, and North district, under which the CM's residence comes. Security was heightened in both the places, the official said.

The call was made through Voice over Internet Protocol (VoIP) service and the details were later transferred to Delhi Police's Spcial Cell, which is trying to track down the unidentified caller, the official said.