Seven persons were arrested on Thursday in connection with the recent attack on some members of Missionaries of Charity in Kozhikode, taking the total number of those arrested in the case to 12.
"In all, we have arrested seven persons on Thursday morning from various parts of the town area and the search is still going on," Crime Branch Superintendent of Police, Mathew Polycarp, told reporters.
Operations were continuing in and around the district to trace the remaining culprits responsible for the attack, the police official said.
Nine members of 'Sneha Bhavan' were attacked by some persons at a Dalit colony in Olavanna panchayat on September 25 when they visited the area reportedly for a rice distribution programme.
While one person was arrested on September 30, four others were arrested on Tuesday, the day when the crime branch took over the probe.