Five train stations in Ukraine have been attacked.
The head of the Ukrainian train service said there were casualties and all of the strikes came within an hour of each other.
Earlier this month, at least 50 were killed in an attack on a train station in the east.
Ukraine President Volodymyr Zelenskyy says his country is not giving up.
"We have no other choice but to defend our land and get it back - what would our other choice be?
"It would be that we have no state, no people.
"This would be just a scorched land. This is the only alternative which I will never take into account."
