Ukraine violence
Germany & France see fresh momentum from Ukraine ceasefire
Officials said Ukraine had agreed to abide by a new seven-day truce proposed by Russian separatists.
The US Department of the Treasury added dozens of people and companies to the list.
The FSB believes Ukrainian special forces had been planning attacks, targeting critical infrastructure.
On Saturday, the Ukrainian border guard service reported the unnamed 25-year-old had been arrested.
He did not elaborate, but said criminals were benefiting from instability in the east.
Troops, weaponry including rocket launchers, tanks and artillery populate the makeshift base.
Moscow has warned Denmark not to join NATO missile defence system if it doesn’t want trouble.
Officials says EU would prepare possible new sanctions on Russia for its involvement in Ukraine conflict.
The threats came in statements issued after a video conference that brought together Obama and world leaders.
A military official said rebels had shelled Ukrainian positions 22 times over the past day.
The move was Kiev's most direct step to acknowledge that the ceasefire was finally holding
Fighting has eased in eastern Ukraine in recent days, raising hope that a ceasefire can finally take effect.
A truce to end fighting appeared stillborn last week after rebels ignored it.
The exchange is one of the first moves to implement the peace deal reached on 2 February.
The Ukrainian Defence Ministry said 13 servicemen were killed and 157 wounded during the withdrawal.
Ukraine pulled thousands of troops out of the east Ukrainian town of Debaltseve on Wednesday.
Separatist forces fought their way into the key railway junction on Tuesday despite a ceasefire.
Fighting has eased but rebels have refused to halt attacks on a town where Ukrainian forces are encircled.
The agreement calls for a ceasefire between Ukrainian forces and Russian-backed separatists.