PARIS (AP) — Europe's privacy watchdogs are demanding details on the extent of U.S. surveillance efforts in the wake of NSA leaker Edward Snowden's revelations about the PRISM spying program.

The National Security Agency's PRISM operation compels major Internet firms to hand over detailed contents of communications such as emails, video chats and more.

The G29, an umbrella organization that includes data protection agencies across Europe, said Monday it wrote EU Justice Commissioner Viviane Reding last week to demand "specifics regarding the exact nature of the data collected" by PRISM, and details on how U.S. authorities access Europeans' data and the recourse EU citizens have.

Germany's independent privacy watchdogs say the surveillance programs breach an EU-U.S. pact meant to ensure cross-border data protection.