US says drone incident over Black Sea was likely unintentional from Russia

A U.S. military surveillance drone's crash into the Black Sea after being intercepted by Russian jets was likely an unintentional act from Russia's side, U.S. State Department spokesperson Ned Price told MSNBC on Wednesday.

Moscow warned Washington on Wednesday to keep well away from its air space after the incident from a day earlier, which took place in international air space near territory Russia claims to have annexed from Ukraine.