Addressing a late night press conference, Raje said: "never in the history of the state such a heinous incident had happened and this is not an attack on the state but on the nation."

She asked all the political parties to come together and face the crisis.

Earlier, Prime Minister Manmohan Singh and Union Home Minister Shivraj Patil spoke to Raje and assured all possible help from the Centre.

Already a company of NSG has arrived to assist the police, she said.

Appealing to the people to maintain peace, she said that section 144 has been promulgated in the city and police vigil has been intensified.

She said investigation was going on and reports is expected tomorrow which would specify who were behind this heinous crime.

Raje also announced a state mourning on Wednesday and said: "all government offices, schools and colleges will be closed for a day as a mark of respect for all those killed in the serial blasts in the pink city."

At least 60 people were killed and about 200 injured in eight near-simultaneous blasts in Jaipur on Tuesday night.

Raje said that a strong law like POTA should be brought to contain the terror in the country which has spread everywhere and is destroying social harmony.