US presidential candidate visits Afghanistan
Updated
US Democratic presidential hopeful Barack Obama has arrived in Afghanistan on an unannounced trip at the start of a major international tour.
Mr Obama, who wants to make Afghanistan the focus of the U.S.-led
war on terror, will visit US soldiers stationed in Afghanistan.
After Aghanistan, he's due to visit Iraq, Jordan and Israel and then Germany, France and Britain.
Meanwhile, four Afghan police officers were killed and another was injured when a bomb struck their vehicle in the southern province of Kandahar.
And in a separate incident in Kandahar, a suicide bomber blew himself up near a police post Saturday.
A police officer and a child were wounded.
