WASHINGTON (AP) — Tightening the reins on the nation’s sweeping surveillance operations, President Barack Obama on Friday ordered new limits on the way intelligence officials access phone records from hundreds of millions of Americans — and moved toward eventually stripping the massive data collection from the government’s hands.

But Obama’s highly anticipated intelligence recommendations left many key details unresolved, most notably who might take over as keeper of the vast trove of U.S. phone records. Final decisions on that and other major questions were left to the Justice Department and to intelligence agencies that oppose changing surveillance operations, and to a Congress that is divided about the future of the programs.