British intelligence leaders say al Qaeda is "rubbing it's hands in glee" over the classified information revealed by former National Security Agency contractor Edward Snowden.
Three spy chiefs testified before the House of Commons in televised hearings Thursday. One British intelligence leader, Iain Lobban, told lawmakers that Muslim terror groups are having daily discussions about ways to mask their communications and avoid surveillance.
"I am not going to compound the damage by being specific in public," he said, but promised lawmakers he would brief them later in private.
Andrew Parker, the head of Britain's Domestic Intelligence Unit revealed that hundreds of U.K. residents are now in Syria, fighting with Islamic rebels against the government. The Syrian civil war is attracting foreign fighters from European countries.