Update: Obama calls killings in Afghanistan outrageous, Posted by Meosha Eaton

WASHINGTON, April 2 (Reuters) - U.S. President Barack Obama on Saturday described as "outrageous" the killings in Afghanistan triggered after the burning of a Koran by a radical fundamentalist Christian preacher in the United States.

"The desecration of any holy text, including the Koran, is an act of extreme intolerance and bigotry," Obama said in a statement released by the White House.

"However, to attack and kill innocent people in response is outrageous, and an affront to human decency and dignity," he said.

At least 10 people have been killed and 83 wounded in the southern Afghan city of Kandahar, officials said on Saturday, on a second day of violent protests over the actions of extremist Christian preacher Terry Jones, who supervised the burning of the Koran in front of about 50 people at a church in Florida on March 20, according to his website.

A suicide attack also hit a NATO military base in the capital Kabul, the day after protesters overran a U.N. mission in the northern city of Mazar-i-Sharif and killed seven foreign staff, in the deadliest attack on the U.N. in Afghanistan.

"No religion tolerates the slaughter and beheading of innocent people, and there is no justification for such a dishonorable and deplorable act," Obama said.

"Now is a time to draw upon the common humanity that we share, and that was so exemplified by the U.N. workers who lost their lives trying to help the people of Afghanistan."

(Reporting by Jeff Mason; Editing by Will Dunham)