<span style="color: #222222;">At least six people have been killed and 31 wounded in a suicide attack on a bus in Afghanistan. </span><br />'' <br />'' <span style="color: #222222;">The vehicle was carrying police officers and workers in Wardak province's capital Maidan Shar. </span><br />'' <br />'' <span style="color: #222222;">Provincial police spokesman Hekmatullah Durrani told a news agency that the blast took place as the bus entered a police compound. </span><br />'' <br />'' <span style="color: #222222;">Taliban has claimed the responsibility for the attack.</span><br />''