A US diplomatic convoy came under fire in Sudan on Monday but nobody was hurt, US Secretary of State Antony Blinken has said.
"This action was reckless, it was irresponsible and of course unsafe," he told reporters in Japan after G7 talks.
Sudan has been gripped for days by deadly fighting between rival forces.
Earlier, it was reported that the EU's ambassador in Sudan, Aidan O'Hara, has been assaulted at his home in the capital Khartoum.