MULTAN: Police have arrested six activists belonging to banned militant organisation Lashkar-e-Jhangvi (LJ) and have learned that the group is planning more attacks against Shias, a police spokesman said on Tuesday. Police said that one of the arrested militants, Nasir, had also admitted his involvement a suicide attack on a Shia mosque in Gulshan-e-Iqbal in Karachi last year, in which at least five people had been killed and 18 wounded.Nasir had a Rs 500,000 bounty on his head. "He is the chief of Lashka-e-Jhangvi's suicide bomber squad in southern Punjab and was involved in plotting a suicide attack at a Shia mosque in Karachi" last year, police spokesman Riaz Khalid said in a statement. The men were arrested in a raid on a militant hideout on Monday in Multan, Khalid said. Khalid said that Nasir, who also went by the name Kashif, was a senior leader in the group which was planning more attacks against Shias in the area.