The UK has announced that it will withdraw troops from Ukraine this weekend and British citizens have been told to leave immediately as the US warns that Russia could invade its neighbor “imminently”.

Britain’s armed forces minister, James Heappey told the BBC Radio 4’s Today show on Saturday: “All of them will be withdrawn…..There will be no British troops in Ukraine if there is to be a conflict there.”

Heappey added: “They will be leaving over the course of the weekend“

RT reports: He urged British nationals to leave Ukraine immediately, arguing that Russia can attack “at no notice.” On Friday, the UK urged its nationals to leave the country “while commercial means are still available.”

Earlier on Saturday, the US ordered the evacuation of all non-emergency staff from its embassy in Kiev and advised Americans against traveling to Ukraine. Several other nations issued red travel notices as well.

Russia, meanwhile, said it was “optimizing” the staff at its diplomatic missions in Ukraine, citing possible “provocations” by Kiev or third parties.

Several Western news outlets quoted US officials on Friday as warning that Moscow could invade Ukraine next week. Russia has denied plans to attack its neighbor.