U.S. and Russian negotiators held long-awaited talks on nuclear arms handle Monday, as the Trump administration presses for an ambitious new accord to change the New Start off treaty, which expires in February.

Marshall Billingslea, the best U.S. envoy on arms handle, tweeted that his daylong assembly in Vienna with Russian Deputy Overseas Minister Sergei Ryabkov has been constructive. Complex doing the job groups, he added, experienced been founded, and the two sides experienced agreed in principle to maintain a next spherical of negotiations.