US preparing to approve evacuation from embassy in Ukraine: Sources

US preparing to approve evacuation from embassy in Ukraine.

The Department of State is preparing to approve the evacuation of some U.S. diplomats and diplomats' families from the embassy in Ukraine, sources confirmed to ABC News.

The final authorization has not been approved, the sources said, so the scope of the evacuation is not yet clear.

A State Department spokesperson told ABC News, "We have nothing to announce at this time. We conduct rigorous contingency planning, as we always do, in the event the security situation deteriorates."

That contingency planning has been underway for weeks now, as ABC News first reported last month that the embassy was preparing for an authorized or ordered departure.