Iraq’s Trade Ministry issued a statement condemned a pre-dawn raid by US forces on a flour mill belong to the Iraqi Grain Board, and demanding an apology.

During the raid, the ministry says US forces killed at least three of the mill’s security guards in their sleep, set fire to offices and searched through files and computers. It was unclear what prompted the raid and the US military declined to confirm the incident, though the statement claims a US officer returned to the scene later to apologize, saying the raid was a mistake.