<div>Over 100 Russian diplomats have been expelled by Western countries following allegation over use of nerve agent attack on a former Russian spy in Britain.&nbsp;</div>''<div><br />''</div>''<div>This is the biggest Western expulsion of Russian diplomats since the height of Cold War.</div>''<div></div>''<div>United States expelled 60 Russian diplomats, describing them as intelligence officers and ordered closure of the Russian consulate in Seattle.&nbsp;</div>''<div><br />''</div>''<div>A dozen of these expelled diplomats are based at Russia's Permanent Mission to the United Nations.&nbsp;</div>''<div><br />''</div>''<div>The White House said, all Russian diplomats, connected to the country's intelligence agencies, and their families have been given seven days' time to leave the country.</div>''<div></div>''<div>Ukraine announced to expel 13 Russian diplomats; Poland, France, Germany and Canada 4 each; Czech Republic and Lithuania, 3 each; the Netherlands, Italy and Denmark 2 each; Estonia, Latvia, Croatia, Finland and Romania one each.&nbsp;</div>''<div><br />''</div>''<div>Canada Foreign Minister Chrystia Freeland said they are taking the measure in solidarity with the United Kingdom.</div>''<div></div>''<div>Britain has already expelled 23 Russian diplomats. Prime Minister Theresa May welcoming the show of solidarity said 18 countries have announced plans to expel Russian officials.&nbsp;</div>''<div></div>''<div>Moscow has denied being behind the attack on Sergei Skirpal and his daughter in Salisbury in Britain.&nbsp;</div>''<div><br />''</div>''<div>Sixty-six-year old Skripal and his 33-year-old daughter Yulia Skripal were found unconscious on a public bench in a shopping centre on 4th of this month and remain critically ill in hospital.</div>''<div><br />''</div>