Ukraine calls on its Western allies not to fuel tension inside the country, after a string of embassies in Kyiv announce that they are closing, citing the threat of a "massive air attack" on the capital. The United States leads the wave of closures, saying it is shutting its Kyiv office to the public after having received "specific information of a potential significant air attack". Greece, Hungary, Italy and Spain -- all NATO members -- have followed suit. IMAGES