The US has accused Russia of deploying more air defence systems in eastern Ukraine in breach of a ceasefire deal.
The state department also said Russia was involved in training separatist forces in the area and building up its forces along the border.
The Kremlin has not yet responded to the claims.
A truce between Ukrainian forces and pro-Russian rebels in east Ukraine was brokered by the West in Minsk in February.
Ukraine accuses Russia of arming the rebels and sending Russian troops over the border – a claim Moscow denies.
https://endtime.com/wp-content/uploads/2017/06/82503014_469166148.jpg 371 660 alphatimes https://endtime.com/wp-content/uploads/2020/06/endtime-logo.png alphatimes2015-04-23 00:00:002018-03-28 15:47:30US accuses Russia of violating deal