The Jaffna Police on February 20 arrested four members of the Aava group following attacks on two houses in Kokuvil in Jaffna District in Northern Province with petrol bombs, reports The Island. They were arrested in two different places in the area and the police took into custody a motorcycle the suspects had used for the attack and two swords, three matchets and some other sharp weapons. The attack had been launched on February 19, the Police said.