Russia has seized three Ukrainian military vessels after they attempted to pass through the Kerch Strait off the coast of Crimea, Ukraine's peninsula annexed by Moscow in 2014.
Ukraine says the move violated the 2003 agreement between the two nations on treating the Sea of Azov and the Kerch Strait as shared waters without any restrictions.
Jeff McCausland from CBS Radio dropped by West Michigan Live to explain why tensions are rising between Ukraine and Russia