Russian foreign ministry said talks with Ukraine over humanitarian aid coming to eastern Ukraine continue.
The two countries traded allegations earlier. Ukraine accused Russia of sending an armoured column across the border to eastern Ukraine, while Russia said Ukraine engaged in intense fighting to stop its humanitarian aid.
More top news
The prince will meet the country's indigenous people on the penultimate day of his tour of the West Indies.
The University of Colorado said it is also terminating Dr Michelle Herren's non-paid medical faculty appointment.
The Dutch KLM pilot was escorted off the aircraft and taken to hospital by ambulance crews.