Ambassadors' cars with Lithuanian, Croatian and Swedish flags are parked near the Russian Foreign Ministry in Moscow, Russia March 30, 2018. (REUTERS PHOTO)

MOSCOW, March 30 (Xinhua) -- The Russian Foreign Ministry on Friday informed heads of diplomatic missions from 23 countries of its decision to expel employees of their diplomatic missions in Russia in a tit-for-tat response to the recent hostile actions by their countries against Moscow.

The diplomats were handed notes of protest and told that a corresponding number of diplomats of their countries working in Russia were declared "personae non gratae" in response to their unjustified expulsion of Russian diplomatic personnel based on Britain's unproven accusations against Russia related to the so-called "Skripal case", the ministry said in a statement.

Earlier this month, more than two dozens of countries announced the expulsion of around 150 Russian diplomats over the poisoning of former Russian double agent Sergei Skripal and his daughter in the British city of Salisbury on March 4.

Russian Ambassador to the United Nations Vassily Nebenzia (Front) addresses a Security Council emergency meeting regarding accusations of the use of a nerve agent in the United Kingdom at the United Nations headquarters in New York, on March 14, 2018. (Xinhua/Li Muzi)

According to the statement, the countries involved in Russia's decision include Australia, Albania, Germany, Denmark, Ireland, Spain, Italy, Canada, Latvia, Lithuania, Macedonia, Moldova, Netherlands, Norway, Poland, Romania, Ukraine, Finland, France, Croatia, Czech Republic, Sweden and Estonia.

The ministry added that taking into account the fact that Belgium, Hungary, Georgia and Montenegro decided to join the listed countries at the last moment, Russia "reserves the right to respond" to these countries.

British ambassador to Russia Laurie Bristow leaves the Russian Foreign Ministry headquarters in Moscow on March 30, 2018. (AFP PHOTO)

In a separate statement, the foreign ministry said it also summoned the British ambassador and informed him that Britain has to downsize its diplomats stationed in Russia to the same level as Russia has in Britain within a month.

In addition, Russia announced its decision on Thursday to expel 60 U.S. diplomats and shut the U.S. consulate general in St. Petersburg in retaliation for Washington's same move against Moscow earlier this week.

The flag of the U.S. flies outside the U.S. consulate in St. Petersburg, Russia, July 31, 2017. (Xinhua/REUTERS)

Tensions between Russia and western countries have exacerbated over the ongoing exchange of diplomatic sanctions.

Earlier on Friday, the Kremlin spokesman Dmitry Peskov said that despite being forced to take retaliatory measures, Russia "remains open to building good-natured relations" with other countries.