WASHINGTON (AP) — There's a report that the National Security Agency has secretly broken into the main communications links that connect Yahoo and Google data centers around the world.

The report appears in the Washington Post, which cites documents obtained from former NSA contractor Edward Snowden.

According to a secret accounting from January, NSA sends millions of records every day from Yahoo and Google internal networks to data warehouses at the agency's headquarters in Fort Meade, Maryland.

The new details about the NSA's access to Yahoo and Google data centers come at a time when Congress is reconsidering the government's collection practices and authority. Meanwhile, European governments are reacting angrily to revelations that the NSA collected data on millions of communications in their countries.

The Post says the White House and the NSA aren't commenting. A Yahoo spokeswoman said the company hadn't given the government any access to its data centers. Google said it's "troubled" by the reports, and that it hadn't been aware of the activity.