. >> a farmer's market was packed with people when the bomb exploded in rawalpindi. the blast was so powerful that it was heard up to 10km away. dozens of people were killed, more injured. the government has been holding peace talks with the pakistani taliban since february. the taliban refused to expand its deadline. >> a statement the taliban denies involvement with wednesday's attack. there are splinter groups. so far no one has claimed responsibility for the blast. pakistan's interior ministry issued warnings of attacks in the capital islamabad and rawalpindi. >> on tuesday, a bomb ripped through the capital, killing more than a dozen. a group claimed responsibility. pakistan has been engulfed by violence for over a decade. the government has been trying to stem the violence through dialogue. wednesday's blast illustrates that that task is difficult. >> let's check in with kamal live in islamabad. you get the feeling that so much is faltering, peace talks, explosions - put it into context here. >> indeed. as you saw in that pack ug, the peace talks -- package, th