Aurangabad: Two days after the landmine blast at Hussainabad in Palamu, Maoists on Thursday claimed the incident took place to avenge the Bandh Gorya encounter under the Dhibra police station area in Aurangabad district, in which four Maoists were killed.A statement released on behalf of CPI (Maoist) central zone spokesman Pramjeet claimed that the organization would launch 'Operation Break' against security personnel and engage them in encounters to give them a befitting reply.He added the police were cheating the people in the name of Operation Vishwas launched to generate a sense of security among them.A police officer said all the 29 police stations in Aurangabad district were on high alert and borders of the district sealed, after the Hussainabad blast."A joint operation will be carried out with the Jharkhand police against the Maoists," said Aurangabad SP Babu, adding the district police were set to launch a massive operation against the Maoists with the jawans of CRPF, COBRA, SSB, STF and DAP.Police patrolling parties were targeted under Dhibra and Tandowa police station areas two years ago in which several policemen, including the SHO of Tandawa police station, were killed. Another SHO of Dhibra police station had a narrow escape in the incident.The office of Deo block development officer was also blown in 2009. Several school buildings and community halls were targeted by the Maoists as the securitymen engaged in anti-Naxal operations took shelter there.A villager at Madanpur and a chowkidar were also gunned down by Maoists recently.