Five Dallas police officers have been killed and six wounded by gunmen during protests against the shooting of black men by police, authorities say.
Three people are in custody and one man who was in a stand-off with police shot himself dead, US media have reported.
Gunfire broke out at around 20:45 local time on Thursday (01:45 GMT Friday) as demonstrators marched through the city.
The protests came after this week’s deaths of Philando Castile in Minnesota and Alton Sterling in Louisiana.
The Dallas attack marks the deadliest day for US law enforcement officers since the 9/11 attacks in 2001.
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