Islamabad , Pakistan ( CNN ) -- Suicide bombings targeting Shiite Muslims on Tuesday killed 16 people in Pakistan , 13 in Lahore and three in Karachi . The Lahore blast occurred in front of a market and near a procession of Shiite mourners commemorating the 40th day of Ashura , which observes the death of the Prophet Mohammed 's grandson . In Karachi , a suicide bomber riding a motorcycle blew himself up next to a police van at a security checkpoint outside another Shiite festival , police said . Two police officers were killed in the blast . Police say Shiites were the target . The attacks reflect the sectarian violence that erupts in Pakistan from time to time . Shiite Muslims are a minority in Pakistan , a Sunni majority country . Zahid Pervez , medical superintendent at a hospital in Lahore , told reporters that dead bodies , including one woman , were brought to the hospital . Police said at least four officers were killed . Pervez said 52 injured people were also brought to the hospital , and 15 of them were in critical condition . Shakir Ullah Shakir , a spokesman for the Fedayeen-e-Islam , said his group targeted the Lahore procession and labeled the Shiites enemies of Islam . The group is an offshoot of the Pakistani Taliban and Laskhar-e Jangvim Sunni militant groups who are notorious for targeting Pakistan 's Shiites . One of the senior leaders of Fedayeen-e Islam is Qari Hussein -- widely believed to be the trainer of child suicide bombers for the Pakistani Taliban . Nayab Haider , Lahore police spokesman , told CNN the suicide bomber was between 13 and 15 years old and that the boy tried to enter the procession carrying a bag . Moments after police stopped him , the attacker blew himself up , Haider said . Local TV reports showed footage of debris and rescue crews whisking away injured people . Pakistani intelligence agencies had warned Shiite religious leaders in Pakistan 's major cities about the threat of attacks targeting events commemorating the holy day .
Shiite Muslims were targets of the attacks , police say . Shiite mourners were commemorating between 13 and 15 years old of Pakistan . The Sunni are a minority in Shiite Muslims -dominated Ashura .