rylee carlson is in london with the latest. good morning. >> reporter: good morning, anne-marie. transnistria in moldova is a sliver of land causing big concern as the war in ukraine rages on. the worry now is the conflict will spill over that border causing an even broader crisis. following a series of explosions in moldova which sits on ukraine's southwest border, ukrainian president volodymyr zelenskyy accused russia of trying to destabilize the entire region, though no one has claimed responsibility. >> we don't know all of the details beyond -- regarding what transpired yesterday, but we remain concerned about any potential attempts to escalate tensions. >> reporter: transnistria is a pro kremlin breakaway region of a where russian troops are based. >> we don't know whether it's a taste of things to come. >> reporter: dr. kataryna colczuk is an associate fellow at the international think tank chatham house. she says russia may be eyeing moldova if it succeeds in ukraine. >> whether it's going to happen, it's actually -- we will see because we have mixed messages from the kre