John Kerry, the US Secretary of State, has welcomed the release in Ukraine of military monitors from the Organization for Security and Cooperation in Europe (OSCE) but said more steps were needed to de-escalate the crisis.
After landing in the Democratic Republic of Congo for a visit, he said: "We will both advance ideas about how to do that, without any promises of what those possibilities may produce. In the end, we reaffirmed our support for the OSCE."
Kerry said he spoke by phone with Russia's Foreign Minister Sergei Lavrov and that both would discuss with Switzerland's president ways the OSCE might "play a larger role in perhaps facilitating the de-escalation".
More top news
OK Go's Upside Down & Inside Out video was shot on a plane capable of parabolic flight, which provides brief periods of weightlessness.
Teaching assistant Kevin Wilson who brutally attacked his heavily pregnant ex-girlfriend killing his unborn son, has been jailed for life.
A 94-year-old former Nazi SS sergeant has gone on trial in Germany over the murder of at least 170,000 people at the Auschwitz death camp.