Ukrainian T-64 tanks moved towards Mariupol

"The justice minister has been instructed today to complete preparations to sue Russia over this act of aggression so that those who gave orders can be held accountable," Poroshenko said at a meeting with the families of Ukrainian sailors arrested for violating the Russian border in the Kerch Strait.

The Ukrainian president was also confident that Kiev’s foreign partners would take measures against those involved in the sailors’ detention. "It concerns those who attacked them and those who brought them before a kangaroo court. The entire world should respond to this incident. We are not going to let anyone go unpunished," Poroshenko said. "A group of lawyers, including foreign ones, is currently working on the possibility of holding Russia responsible," he added.

More: http://tass.com/world/1034221