A grenade blast in Kenya's capital city of Nairobi killed one person and wounded nine others on Friday, just hours before U.S. Secretary of State Hilary Clinton was scheduled to arrive as part of her seven-nation African tour.
Prelimary investigations indicated that the suicide bomber wanted to attack a supermarket in Eastleigh's First Avenue, near the Moi Air Base before the grenade exploded by mistake.
The attack was reported to have taken place just hours before the Clinton landed in Nairobi.
Clinton is scheduled to arrive at the Jomo Kenyatta International Airport on Saturday for meetings with President Mwai Kibaki, Prime Minister Raila Odinga and Chief Justice Willy Mutunga.
Clinton's trip will partly focus on U.S. security ties in the face of growing threats from Islamist militants.
In the past Nairobi has blamed Somalia's al Qaeda-linked al Shabaab, which has threatened to retaliate since the east African economic powerhouse's military pursued the Islamists in Somalia in October.