American airstrikes in Syria show that Iran can expect consequences for supporting militia groups threatening US interests and personnel, Joe Biden has warned. "You can't act with impunity. Be careful," the US president said when asked what message he intended to send with the airstrikes early on Friday morning on Syria 's eastern border with Iraq. Satellite images show a group of buildings before the airstrike and the obliteration of most of them after. The Pentagon said the strikes by two Air Force F-15E aircraft using seven missiles destroyed nine buildings and heavily damaged two others in eastern Syria used by Iran-backed militias. They added that the strikes were not intended to eradicate the groups using them for attacks inside Iraq but to show the US will act firmly while trying to avoid a widespread regional escalation. Advertisement US officials said the airstrikes, Mr Biden's first military action as president, were legal and … [Read more...] about Syria: After US airstrikes, Biden warns Iran of consequences for supporting militia groups