Critics are concerned about its impact on civil liberties.

Donald Trump and his allies had lobbied aggressively all week for a clean renewal of the controversial surveillance program used by U.S. spy agencies.

The decision to extend a warrantless security law until 30 April came after 20 Republicans worked with House Democrats to defeat attempts to pass five-year and 18-month renewals

Lawmakers in the U.S. House of Representatives backed a 10-day extension of a controversial surveillance clause of the FISA Act to prevent it expiring.

Critics are concerned about its impact on civil liberties.