The US storms Iranian embassy in Iraq

This is the only report I've seen so far (BBC.) In normal circumstances, this is an act of war.

US forces have stormed an Iranian consulate in the northern Iraqi town of Irbil and seized six members of staff.....

One Iranian news agency with a correspondent in Irbil says five US helicopters were used to land troops on the roof of the Iranian consulate.

It reports that a number of vehicles cordoned off the streets around the building, while US soldiers warned the occupants in three different languages that they should surrender or be killed.

A little later: Reuters, AP

Later still: The US says it wasn't an embassy. The phrases "consular building" and "diplomatic representation" are being thrown around.