The UK announced Wednesday it will expel 23 Russian diplomats — the biggest such expulsion since the Cold War — and break off high-level contacts with the Kremlin over the nerve-agent attack on a former spy and his daughter in an English town, Daily Sabah reported.

Prime Minister Theresa May told lawmakers that the 23 diplomats, who have been identified as undeclared intelligence officers, have a week to leave.

She announced a range of economic and diplomatic measures, including the suspension of high-level bilateral contacts with Russia. An invitation for Russian Foreign Minister Sergey Lavrov to visit Britain has been canceled, and May said British ministers and royals will not attend the soccer World Cup in Russia this summer.