Afghan President Hamid Karzai accused the United States of launching a drone strike that killed a 2-year-old child Thursday and vowed to not sign a long-term security agreement if similar attacks continue.

In a statement, Karzai said a suspected U.S. "pilot-less aircraft" fired into a house shortly before noon in Helmand province, killing the child and wounding two women. He said the information was relayed to him by Mohammad Naem, the governor of the province.

Spokesmen for the U.S.-led coalition did not respond to requests for comment. The U.S. Embassy in Kabul referred questions to the international coalition.