At least five people were killed and more than a dozen injured Tuesday in two attacks in north-western Pakistan, officials said. A bomb exploded in the basement of a building on the busy Arbab Road of Peshawar, capital of Khyber Pakhtunkhwa. The chief of Khyber Teaching Hospital said it had received 24 injured victims. "Two injured died in the hospital and five others are still in critical condition," Muhammad Zafar Afridi said. Provincial information minister Mian Iftikhar said the attack could have been a retaliation for recent military operations that killed a local rebel commander. A mortar shell was also fired at a busy market in Khyber, one of seven tribal districts near the Afghan border, according to a report of the German Press Agency "DPA" District official Rehman Shah said three people were killed and another three injured in the attack.