Islamabad , Pakistan ( CNN ) -- For the second time in two days , a deadly blast shook a northwest Pakistani city as worshippers marked the sacred holiday of Ashura . The explosion occurred near a Shiite Muslim procession in Dera Ismail Khan . The bomb was planted inside a bicycle repair shop , killing five people and injuring more than 70 others , said Mian Iftikahr Hussain , the provincial information minister . A spokesman for the Pakistani Taliban said the group was behind Sunday 's bombing on the procession and warned of more attacks . A day earlier , the Pakistani Taliban claimed responsibility for a blast that killed seven people , including three children , during a Shiite religious procession in the same city Saturday . That bomb was planted in a garbage container and exploded as the last section of the procession , in which children were following adults , was passing by , police spokesman Khalid Sohail said . Eighteen people , including five children and two police officials , were wounded in Saturday 's attack . The spokesman for the Pakistani Taliban , Ihsanullah Ihsan , said the group would continue `` its mission '' and attack Shiite Ashura processions across Pakistan . Pakistan has been on high alert because of the two-day holiday of Ashura , in which believers mourn the death of a key imam from the 7th century . The government increased security for the Ashura observance . Taliban claim blasts killing dozens in Pakistan . Shia Islam is a minority sect in the mainly Sunni Muslim country , and its members face persecution from extremists . The Pakistani Taliban took responsibility for similar attacks earlier this week . Interior Minister Rehman Malik temporarily blocked cell phone services in cities , where gathered intelligence indicated the possibility of bombs detonated by cell phone . He also banned motor bikes , often used to conceal bombs , for two days in some cities . Malik said the safeguards were specifically meant to protect Shiites . Pakistan Taliban threaten to target India after execution of Mumbai attacker . Despite heightened security , at least 31 people were killed and 68 wounded in multiple bomb attacks Wednesday . A Taliban spokesman said those attacks targeted Shiites , whom the terrorists believe denigrate the Prophet Mohammed with their religious observance . Ashura commemorates the death of the Prophet Mohammed 's grandson , killed in the Battle of Karbala in 680 AD . The battle and subsequent death of Imam Hussein caused the split between Shiite and Sunni Muslims .
NEW : The Pakistani Taliban say they are behind the 7th century 's bombing . Shiite have been marking the sacred holiday of Pakistan . The Pakistani The Pakistani Taliban claimed responsibility for an earlier fatal attack . The terrorist group has vowed to attack Shiite Ashura processions across Ashura .