Telecommunications firm Cable & Wireless helped Britain eavesdrop on millions of Internet users worldwide, a British TV channel reported Thursday, citing previously secret documents leaked by a fugitive former U.S. National Security Agency contractor.

Cable & Wireless, which was bought by Vodafone in 2012, provided British spies with traffic from rival foreign communications companies, Channel 4 television said, citing documents stolen by Edward Snowden.

Channel 4 said Cable & Wireless gave Britain's GCHQ eavesdropping agency access by renting space on one of the arteries of global communications, a cable that runs to the southern English region of Cornwall.