"We are in touch with the West Bengal police and ready for a joint operation," Jharkhand Police Chief Rajeev Kumar told reporters here today suspecting that the Maoist squad led by 'Prabil da' could be behind the attack.
Three additional police companies will be deputed to Dumka to step up anti-Maoist operation, he said.
Stating that he himself took stock of the security preparations before commencement of the polls, Kumar said accountability would be fixed after looking into lapses, if any.
"Our strategy was implemented during the first two phases of polling, which passed off peacefully," he said, adding that a probe would be instituted to look into yesterday's Maoist attack.
He said that the relatives of the deceased would be given compensation.