The Russian Foreign Ministry summons Poland’s ambassador to protest his country’s expulsion of Russian diplomats, informing him of Moscow’s decision to respond in kind.

It is the biggest dispute between the two countries since the end of decades of Soviet domination of Eastern Europe in 1989.

Russia has pledged to retaliate after the Czech Republic expelled 18 Russian diplomats over a 2014 explosion that killed two people in an eastern Czech town.

Russia denounces Bulgaria’s “groundless” decision to expel two Russian diplomats over accusations of espionage, reserving the right to retaliate.

The UNHCR expresses alarm over the increasingly frequent repulsion and expulsion of refugees at Europe’s border, urging European countries to halt these practices and protect the right to seek asylum.

Russia expels two Dutch diplomats from the country in retaliation for similar move by the Netherlands.

The chief commander of Iran's Army says potential expulsion of the American forces from the region is the smallest part of Iran’s ongoing “harsh revenge” against the US.

Iraq’s Harakat al-Nujaba resistance group warns of a “malicious” American plot to disintegrate the country through a soft war combined with political and religious sedition.

Russia says it will definitely reciprocate Slovakia's expulsion of its three diplomats as the US welcomes the move by the East European state.

A top US general says American forces will remain in Iraq for the foreseeable future.