U.S. dollar and Japan yen notes are seen in this photo illustration June 2, 2017.
U.S. dollar and Japan yen notes are seen in this photo illustration June 2, 2017. Reuters / Thomas White

The safe-haven Japanese yen fell slightly against the dollar on Friday, pulling back after recent gains, but remained up for the week as a series of developments in the Ukraine-Russia crisis put investors on edge.

On Friday, Russian-backed separatists in eastern Ukraine said they planned to evacuate their breakaway region's residents to Russia, while U.S. Secretary of State Antony Blinken said the events transpiring in the border area over the past two days are part of a Russian scenario to create false provocations.

News late Thursday that Blinken had accepted an invitation to meet with Russian Foreign Minister Sergei Lavrov late next week gave some relief to investor jitters.

In late morning New York trading, the dollar was up 0.2% at 115.115 yen. For the week, the dollar was down 0.4% against the Japanese currency. Against the Swiss currency - another safe haven - the dollar was up 0.2% at 0.9214 francs.

"Everyone is fixated over what's happened with the Ukraine situation. There's a tremendous amount of nervousness. Everyone is hoping for some type of deescalation but it just doesn't seem like that is the direction things are going," said Edward Moya, senior market analyst, at Oanda in New York.

"The trade has been about safe havens, and it's been a great week for the Japanese yen. Today the yen is slightly softer but the overall concern right now is you're entering the long weekend, and you still have a lot rhetoric coming out of Russia," he said.

The Russian rouble weakened 0.88% versus the greenback at 77.08 per dollar.

The euro was down 0.3% against the dollar at $1.1328, while the U.S. dollar index was up 0.3%.

Bitcoin last fell 2.5% to $39,534.