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.