U.S. Secretary of State Hillary Clinton has expressed regret at the loss of civilian lives in Afghanistan, apparently by U.S. air strikes in the country.
Clinton spoke Wednesday at the State Department, in a meeting with Afghan President Hamid Karzai and Pakistani President Asif Ali Zardari. The two presidents meet later in the day with President Barack Obama.
Clinton said the Obama administration deeply regrets the civilian casualties and said that there will be a joint investigation by the U.S. and Afghan governments.
Mr. Karzai thanked Clinton for showing concern over those deaths, saying that he hopes the United States and Afghanistan can work together to eventually eliminate the possibility for such fatalities.
Clinton said the U.S., Afghanistan and Pakistan face a "common enemy" with extremists.
Mr. Karzai and Mr. Zardari expressed a willingness to work together.