A U.S. military commander says American forces are responsible for "mistakenly" hitting a hospital in Kunduz, Afghanistan on Saturday. The bombing killed 22 people.

Army General John Campbell told a congressional committee in Washington that Afghan forces requested the airstrike. The Afghan forces said Taliban fighters were firing from the hospital.

The hospital is operated by the international medical charity Doctors Without Borders.

General Campbell said the U.S. led the raid after reviewing the request. To be clear, the decision to provide aerial fire was a U.S. decision made within the U.S. chain of command, Campbell said. A hospital was mistakenly struck. We would never intentionally target a protected medical facility.

General Campbell did not discuss additional details about the airstrike. U.S. and Afghan investigations into the bombing continue.