<sod >At least three people have been killed and as many as 50 wounded after aÃÂÃÂ powerful explosion rocked the city centre of the Afghan capital of Kabul.< eod>< sod > At least 17 people have been killed and 110 wounded after aÃÂÃÂ powerful explosion rocked the city centre of the Afghan capital of Kabul.< eod>