FBI combed through NSA's trove of Americans' communications WITHOUT a warrant in its search for 'racially motivated violent extremists&

* A newly declassified report shows the FBI trawled through vast troves of Americans' communications collected by the National Security Agency

* Despite previous warnings it was violating the Constitution, the report reveals how the FBI continues to use warrantless searches for routine criminal cases

* A single request from an FBI analyst for NSA data 'in connection with predicated criminal investigations relating to domestic terrorism' turned up 33 hits

* It's unclear from the heavily-redacted FISA court report whether it uncovered any criminal extremist behavior or made any arrests resulting from the searches

* A senior FBI official told the DailyMail.com the FBI had taken 'numerous steps' to comply with the FISA court guidance over the past 18 months

* It comes as the DHS vows to root out domestic extremists within its ranks, and Congress ponders new domestic terror laws

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