After attacks in Paris on Charlie Hebdo, U.K. Prime Minister David Cameron proposed creating an anti-terror law for the internet that would potentially ban encryption in messages.

Cameron’s comments came after it was reported that at least one gunman, in a separate but related incident, allegedly contacted others to activate additional terrorist sleeper cells. 

Seemingly putting apps like Snapchat and WhatsApp in the crosshairs, Cameron pledged to eliminate “safe space” for terrorists to communicate and called for a strengthening of intelligence agencies’ ability to monitor the internet’s “dark places,” according to a report in The Guardian.

The prime minister’s remarks were roundly criticized by privacy advocates and his opponents, with Deputy Prime Minister Nick Clegg noting in a speech the “irony” of Cameron supporting free speech at a Paris rally on Sunday before appearing to squash it on Monday.