Russia on Wednesday ordered the expulsion of seven diplomats from Slovakia, Lithuania, Latvia, and Estonia, in retaliation for the expulsion of Russian envoys in the wake of Czech accusations that Russian intelligence was behind a deadly 2014 blast. Moscow and Prague are locked in their biggest row since the end of the Communist era in 1989, which has spiraled into a series of diplomatic disputes with other European Union and NATO countries as Russia’s ties with the West linger at post-Cold War lows. Russia’s foreign ministry gave the three Slovak and two Lithuanian diplomats, as well as an envoy from Latvia and another from Estonia, one week to leave Russia. Russia accused the four countries of showing “pseudo-solidarity” with the Czech Republic, which ordered most Russian diplomatic staff in Prague to leave last week after accusing Russian spies of being behind the blast at an ammunition depot. Meanwhile, Bulgaria said …