"As you know, currently the US-Ukraine joint military exercises are underway. Within these exercises, the military vehicles and equipment of the units involved entered the Ukrainian territory," Slobodyan said.
"After the drills end the vehicles will leave Ukraine," he added.
Earlier, Denis Pushilin, envoy of the self-proclaimed Donetsk People’s Republic to the Minsk talks, said the DPR considers the arrival of US military instructors in Ukraine an effort to escalate the Donbass crisis. He also expressed concerns that after military vehicles could stay in Ukraine even after the drills.
The Russian Foreign Ministry said training of Ukrainian servicemen to handle Western military equipment can be assessed as a first step to delivering modern US weapons to Ukraine.