A shaky truce between pro-Russian rebels and Ukraine came close to breaking down completely yesterday in eastern Ukraine. In the country's west, troops from the US and 14 other countries are joining pre-scheduled exercises.
Dutch investigators say cockpit recordings show no emergency in the moments before Malaysian Airlines Flight MH17 went down on July 17. Pro-Russian rebels fighting in eastern Ukraine are widely blamed for the incident.
A phone call between Ukrainian and Russian heads of state yields no breakthrough. NATO talks in Wales are expected to focus on the eastern Ukraine conflict and alleged Russian intervention there.
The detention of the Russian paratroopers, who claim to have crossed the border accidentally, comes as the presidents of Russia and Ukraine attend a regional summit, with some speculating that the two may meet.
Russian trucks loaded with humanitarian supplies had been idling at the border, but some have now entered Ukraine without permission, which Kiev considers an act of aggression. Russian and Ukrainian leaders are to meet next week.