"I will also deny the pending accreditation request for three others", he said, according to an UNIAN correspondent in Brussels.
NATO Secretary-General Jens Stoltenberg said on Tuesday he had also cut the maximum size of the Russian mission to 20 people from 30, in the latest move by the alliance to reduce what was once one of the biggest national delegations at NATO.
Stoltenberg said that Russian Federation had exhibited a pattern of disregarding the sovereignty of other nations, going back to the illegal annexation of Ukraine's region of the Crimea in 2014.
Pressure on Moscow is mounting as Australia's Prime Minister Malcolm Turnbull announced the expulsion of two Russian diplomats from his country earlier on Tuesday.
He noted that the alliance had thus sent a clear message to Russian Federation that there were "costs and consequences for its unsafe pattern of behavior".
"This is the result of colossal pressure, colossal blackmail which is the main instrument of Washington on the global arena", Russian Foreign Minister Sergey Lavrov said Tuesday.
"I have today withdrawn the accreditation of 7 staff of the Russian mission to North Atlantic Treaty Organisation".
These decisions come as a continuation of the diplomatic demarche of the countries of the West due to the use of the nerve agent in the UK. The provocative gesture of the so-called solidarity of these countries with London, which blindly followed the British authorities in the so-called "Skripal case" and which never got around to sort out the circumstances of the incident, is a continuation of the confrontational policy to escalate the situation. Former GRU officer Sergei Skripal and his daughter Yulia were poisoned on 4 March. Britain says they were poisoned with a Soviet-made military-grade nerve agent known as Novichok.
Lavrov warned that Moscow will retaliate for the expulsions, saying "such boorishness can't be tolerated".