Europe : John Kerry tells Russia its continued escalation ` ` would close ... Those questioned declined to say what was happening inside . space for diplomacy '' Obama calls up world leaders to demand Russia ` ` de - escalate '' ' . Russian troops seized a Crimean border control point , Ukraine border service closed . Amid disturbances , Poland closed its consulate in Sevastopol , Crimea .
Europe : John Kerry tells Russia its continued escalation ` ` would close ... space for diplomacy '' Obama calls up world leaders to demand Russia ` ` de - escalate '' ' . Russian troops seized a Crimean border control point , Ukraine border service closed . Amid disturbances , Poland closed its consulate in Sevastopol , Crimea .