LVIV, Ukraine — 

Russian negotiators Tuesday offered to pull back attacks on the Ukrainian capital, Kyiv, in a step toward ending the war between the two nations, but U.S. and Western officials remained skeptical of Moscow’s true intentions.

The offer came as Russian and Ukrainian officials held a new round of talks and Ukrainian forces continued to mount fierce resistance in northern parts of the country against a relentless campaign of Russian shelling and missile attacks that has destroyed residential neighborhoods, hospitals and fuel storage depots.