Union home minister Shivraj Patil met Prime minister Dr Manmohan Singh [Images] and appraised him about the two blasts that left one person dead and over forty injured on Sunday.

PM condemned the gory act and asked people to remain calm. He assured Delhiites that the government would ensure their security.

Dr Singh also said he would be visiting the injured in hospital in the morning.

The blasts coincided with the United Progressive Alliance's one year in power at the centre.

The Delhi police is not ruling out the possibility of the involvement of some terrorist outfits from Punjab.

Two powerful blasts shook Liberty and Satyam [Get Quote] Cinema halls screening the controversial film Jo Bole So Nihal.

"The blast in the liberty cinema hall was so powerful that it not only ripped the roof and the seats but also dug up the floor beneath the seat under which the bomb was placed. There is a one foot diameter crater there," a senior fire officer told rediff.com.

Officers do not rule out the possibility of use of RDX.

"It is too early to say anything about the nature of the bomb. We are in the process of picking up samples," a senior officer told this correspondent.

Delhi Chief Minister Shiela Dikshit and Delhi police commissioner Dr K K Paul were amongst the first to visit the spots for inspection.

Dikshit chose not to speak to media persons.