The US had raised red flags about Brussels terror suspects before the attacks

Belgian police

Two brothers who carried out suicide bombings in Brussels this week were known to U.S. government agencies before the attacks, according to two sources familiar with the matter.

The sources said that Khalid El Bakraoui and Brahim El Bakraoui were both on U.S. government counter-terrorism watch lists before the attacks.

Belgian prosecutors have identified Brahim El Bakraoui as one of two suicide bombers who attacked Brussels’ Zaventem Airport, while they say Khalid El Bakraoui was the man who carried out a suicide bombing at Brussels' Maelbeek Metro station, near European Union headquarters.

(Reporting by Mark Hosenball; Editing by Don Durfee and Tim Ahmann)

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