Bulgaria and Lithuania fear they could be next on Russia's hit-list but U.S. Vice President Joe Biden promises: 'We're in this with you'

Pro-Russian militia have taken control of Ukraine's naval base in Crimea Crimea's leader has urged the Kremlin to go deeper into Ukraine Lithuania, Latvia and Estonia expressed concern over the developmentsBiden said the U.S. will defend any NATO member against 'aggression'
Its comes amid eports of FSB secret services agents flooding into Transdniestria, a breakaway pro-Moscow region of ex-Soviet state Moldova
The region's leadership has signaled their wish to be integrated into Russia
Fears were rising last night that Russia could seek to grab more territory in eastern Europe as Moscow's noose tightened in Crimea with Ukraine troops forced into abject surrender. U.S. Vice President Joe Biden sought to reassure the three ex-Soviet Baltic republics of Lithuania, Latvia and Estonia that America will defend any NATO member against aggression. 'We're in this with you, together,' he said in Vilnius, amid jitters in three countries overrun by Stalin during the Second World War which only won their freedom with the collapse of the Soviet Union. He said: 'Russia cannot escape the fact that the world is changing and rejecting outright their behaviour.'

'We're in this with you': U.S. Vice President Joe Biden vowed America will defend any NATO member from aggression as ex-Soviet states expressed concerns over the developments in Crimea

Talks: U.S. Vice President Joe Biden met with Lithuania's President Dalia Grybauskaite (centre) and Latvia's President Andris Berzins (left) on Wednesday