Gunmen in the Pakistani port city of Karachi have shot dead a Shia Muslim lawyer of the High Court of Sindh and his two sons, police officials say.The assailants, riding a motorbike, gunned down Saqlain Kauser and his two sons, aged 12 and 15, on Tuesday, on their way to the children’s school. No group has claimed responsibility for the attack. Karachi police chief Iqbal Mahmood said, “Apparently it seems a sectarian killing.” Pakistani lawyers have strongly condemned the fatal shooting, calling off all the proceedings of the High Court of Sindh Province to mourn the death of their colleague and his sons. This is the latest deadly incident in a wave of violence against the Shia Muslim community in Pakistan. Human Rights Watch says more than 400 Shias were killed in Pakistan in 2012, which was the deadliest year on record for the Pakistani Shia Muslim community. On February 16, a bomb attack targeting Shia Muslims in the main bazaar of the southwestern city of Quetta killed at least 90 people, including women and children, and injured more than 200 others. Also on January 10, a twin bomb attack at a crowded billiard hall in Quetta, which is the capital of Balochistan Province, killed more than 90 people, mostly Shia Muslims.