Russia expelled 59 diplomats from 23 countries on Friday and said it reserved the right to take action against four other nations in a worsening standoff with the West over the poisoning of a former Russian spy and his daughter in Britain.

Russia said it was responding to what it called the baseless demands for scores of its own diplomats to leave a slew of mostly Western countries that have joined London and Washington in censuring Moscow over the poisoning of Sergei Skripal and his daughter Yulia.

A day earlier, Moscow ordered the expulsion of 60 U.S. diplomats and the closing of the U.S. consulate in St Petersburg, Russia¡¯s second city, in retaliation for the biggest ejection of diplomats since the Cold War.