French President Francois Hollande has denounced as "unacceptable" cease-fire violations in eastern Ukraine.
Hollande was speaking in the western German city of Aachen on May 14, after a brief conversation with his Ukrainian counterpart, Petro Poroshenko.
"There are cease-fire violations today and that's unacceptable," he said, "There is a risk of fresh unrest and we need to warn [about] that."
Poroshenko also held separate talks with European Commission President Jean-Claude Juncker and European Council President Donald Tusk.
More than 6,000 people have been killed since fighting began in April 2014 between Ukrainian government forces and pro-Russian separatists in eastern Ukraine, which continues to be embroiled in sporadic fighting despite a cease-fire sealed in mid-February and brokered by Germany and France.