Three persons, including two activists of the Indian Secular Front (ISF), were killed and several policemen injured in West Bengal`s South 24 Parganas district as a clash broke out outside a centre where counting of votes for rural polls was going on, police said on Wednesday, reported PTI.

The two deceased ISF supporters were identified as Rezaul Gazi and Hasan Mollah, while the other person was Raju Mollah, a senior officer told PTI.