This is all that remains of two buses after twin blasts in the Kenyan capital.<br/> <br />Police believe the attackers planted improvised devices inside.<br/> <br />The vehicles were crowded at the time of the explosions.<br/> <br />Several people have been killed and dozens were wounded in the explosions along Thika Super Highway about 1 kilometre apart.<br/> <br />At least 20 are in critical condition. Several passengers were treated on the road while the severely wounded were rushed to hospitals.<br/> <br />Sunday's attack was the second in Kenya in as many days. Recent violence has been blamed by the government on Somali Islamist group al-Shabaab.<br/> <br />The al-Qaeda-linked group has in recent years launched attacks like these in retaliation for the country's military involvement in Somalia.
