The incident was among at least 40 separate drone and rocket attacks that have been launched at US forces by Iranian-backed militias in Iraq and Syria over the past three weeks in response to American support for Israel in the Gaza war, according to Pentagon data and the two US officials. Meanwhile, President Joe Biden told reporters on Thursday that the US will hit targets linked to Iran's Islamic Revolutionary Guard Corps and affiliated groups again if needed, after the US military hit a facility in Syria following a wave of attacks on American and coalition troops there and in Iraq.