Wall Street loses some ground

US stock indices declined on Tuesday as markets follow the developing crisis in Ukraine closely.

The Russian army is now moving heavy military equipment to western Russia, in what looks like a new military spear towards Kiev.

The US intends to support Ukraine with US planes piloted by Ukrainian pilots from Polish airports

It's worth noting that Russia is one of the largest exporters of industrial metals such as nickel and palladium.

Russia threatened to cut natural gas supplies through its major pipeline with Europe in response to threats of banning Russian supplies.

Dow Jones fell 0.4% to 32,677 as of 15:27 GMT, while NASDAQ shed 0.7% to 12,730, as S&P 500 slid 0.7% to 4,132.