Britain's media regulator said Russia Today could lose its license to broadcast in the U.K. if Prime Minister Theresa May's government determines that Moscow was behind a chemical attack on a former Russian double agent in England this month.

As the crisis in relations between London and Moscow escalated over the nerve agent attack on Sergei Skripal and his daughter, Yulia, a Russian foreign ministry spokeswoman warned that not a single British media outlet would work in Russia if its state-owned network was banned in Britain.

Russia Today, or RT, is a round-the-clock news network that is funded by Vladimir Putin's government to broadcast news with an edge for viewers who want to "question more." Some British lawmakers have said it should be blocked after the poisoning.