President Joe Biden said he has no plans to send troops into Ukraine to rescue U.S. citizens in the event of a Russian invasion, saying Americans and Russians shooting at each other would amount to a “world war”.

“It’s not like we’re dealing with a terrorist organization. We’re dealing with one of the largest armies in the world. It’s a very different situation and things could go crazy quickly”, - Biden said in an interview with NBC Nightly News’ Lester Holt.

Asked if there was a scenario in which he would deploy troops to help evacuate Americans, Biden said: “There’s not. That’s a world war when Americans and Russia start shooting at one another”.

The president repeated a warning for Americans still in Ukraine to leave now, adding: “We’re in a very different world than we’ve ever been”.