Blast kills 13 near Pakistani Army headquarters in Rawalpindi By Sophia Saifi and Zahir Shah, CNN January 20, 2014 -- Updated 0756 GMT (1556 HKT) NEW: The death toll rises to 13, including one child, police say The Pakistani Taliban claim responsibility for the attack The explosion hits a highly sensitive military area near the army's general headquarters It comes the day after an attack on an army checkpoint killed at least 22 people Islamabad, Pakistan (CNN) -- At least 13 people were killed and 28 others were wounded in a suicide bombing Monday at a market near the Pakistani Army's headquarters, police said. Those killed in the attack at the Royal Artillery Bazaar include civilians, security personnel and at least one child, Rawalpindi police official Muhammad Maqbool told CNN. The Royal Artillery Bazaar is in a highly sensitive military area close to the general headquarters of the Pakistani Army in Rawalpindi, a city that neighbors the Pakistani capital of Islamabad. Police said that attack took place at 7:50 a.m., during a busy period for people traveling to offices and schools. The Pakistani Taliban claimed responsibility for the attack through their spokesman Shahidullah Shahid. It comes the day after an explosion at an army checkpoint in the northern city of Bannu killed more than 20 people and wounded dozens more. That blast was also claimed by the Pakistani Taliban, who said it was to avenge the killing of one of their commanders in a U.S. drone strike last year. Pakistani Prime Minister Nawaz Sharif condemned the Bannu attack and said he was canceling a planned trip to Davos, Switzerland, where the World Economic Forum takes place this week. CNN's Sophia Saifi reported from Islamabad and Zahir Shah reported from Peshawar.