Launching a massive crackdown on anti-social elements, Kerala police arrested more than 2,500 people across the state. Police, in a statement, said 2,507 persons were arrested across the state as part of its initiative to curb anti-social activities in Kerala. The arrests were made after raiding 3,501 places since February 4 and registered a total of 1,673 cases, the State Police Chief's Office said. CH Nagaraju, Thiruvananthapuram police commissioner, briefed the press about the situtaion.