Baton Rouge shootings: Gunman's videos show anger at police
The man identified as the killer of three US police officers in Baton Rouge had posted videos complaining at police treatment of African Americans and urging them to "fight back".
One of Gavin Long's videos stresses he is not linked to any group but is "affiliated with justice".
The ex-Marine, 29, was killed by police during the attack on Sunday morning.
Tension has been high since police shot dead a black man in Baton Rouge two weeks ago.
That death - and a second police shooting in Minnesota - sparked protests across the United States and triggered a revenge attack by a black army veteran who shot dead five officers in the city of Dallas.
Responding to the latest killings, President Barack Obama called upon all Americans to unite and refrain from divisive language.
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