(THE GUARDIAN) — Private firms are selling spying tools and mass surveillance technologies to developing countries with promises that “off the shelf” equipment will allow them to snoop on millions of emails, text messages and phone calls, according to a cache of documents published on Monday.

The papers show how firms, including dozens from Britain, tout the capabilities at private trade fairs aimed at offering nations in Africa, Asia and the Middle East the kind of powerful capabilities that are usually associated with government agencies such as GCHQ and its U.S. counterpart, the National Security Agency.

The market has raised concerns among human rights groups and ministers, who are poised to announce new rules about the sale of such equipment from Britain.

“The government agrees that further regulation is necessary,” a spokesman for the Department for Business, Innovation and Skills said. “These products have legitimate uses … but we recognise that they may also be used to conduct espionage.”

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