Patna, Oct 28 (IANS) The CPI-M Monday called for strengthening the intelligence network to foil terror attacks and sought the arrest of "real culprits" in the Patna bombings that killed six people.

"These cowardly attacks once again highlight the urgent need to strengthen intelligence against terror attacks," the Communist Party of India-Marxist said in a statement.

"Governments at the centre and the state have to coordinate to ensure that the real culprits are arrested," it added.

Six people were killed and more than 80 injured in a string of bomb blasts in Patna Sunday, including six in and around the Gandhi Maidan where BJP leader Narendra Modi later addressed a huge rally.