Police also strengthened security at Jantar Mantar where Anna Hazare and his team are on an indefinite fast following the explosions in Pune. A bomb disposal squad conducted searches at the protest venue, a senior police official said.
Around 100 more police personnel were rushed to the venue late Wednesday night. Police closed two of the three entry points to the venue as a precautionary measure.
Roads near Prime Minister Manmohan Singh's official residence were also barricaded. More personnel were also deployed near India Gate.