Russia drills 150,000 troops near border
Russia has conducted a series of what it calls "military preparedness drills" near the country's border with Ukraine.
The United States and Ukraine's interim prime minister have expressed concern at the activity.
Arseniy Yatsenyuk insisted that Ukraine would find a "political solution" to the tension in the country's autonomous Crimea region, a centre of pro-Russian sentiment.
Daniel Sandford reports.
- From the section Europe