A fifth police officer has died of their injuries, the Dallas Police Department said.

***
10:10

Four Dallas police officers have been killed and seven wounded by sniper fire during protests against the shooting of black men by police, authorities say.

Police are in a standoff with one armed man in a garage. Three other people have been detained.

Gunfire broke out at around 20:45 local time on Thursday (01:45 GMT Friday) as demonstrators marched through the city.

The protests were sparked by the deaths of Philando Castile in Minnesota and Alton Sterling in Louisiana.

Dallas Police Chief David Brown said officers remained in a stand-off with one armed man at a garage who was firing off rounds with a rifle and had claimed to have planted bombs.

Chief Brown said that a woman who was in the vicinity of the armed man was now being questioned.

Police also said officers had intercepted a car after a person threw a camouflaged bag into the back and sped off. Two occupants were being questioned.

Chief Brown said the suspects were all believed to have been working together, using rifles to carry out attacks while the rally was taking place.

He added: "We do not have a comfort level that we have all the suspects."



He had earlier said 11 officers were shot "ambush style" by the sniper fire, killing three. Police later tweeted that a fourth officer had died. One of those killed was a transport police officer.

The police said it appeared that two snipers had fired from "elevated positions" during the protest rally.

"We believe that these suspects were positioning themselves in a way to triangulate on these officers from two different perches... and planned to injure and kill as many law enforcement officers as they could," Chief David Brown said.

The mayor of Dallas, Mike Rawlings, said it was a "heartbreaking moment for the city".

One of the march`s organisers, Rev Jeff Hood, saw people scramble for cover as gunfire rang out.

"I ran away from the shots trying to get people off the streets and I was grabbing myself to see if I was shot," he told the Dallas Morning News.

Police had earlier issued a photo of one man with a rifle slung over his shoulder, saying he was a suspect. Police later tweeted that he had handed himself in. It is unclear if he was involved in the shooting.
Flights over Dallas have been restricted.

Captured on video

The Dallas protests were among several held across the US over the police use of lethal force against African Americans.

Philando Castile was shot dead at a traffic stop in St Paul, Minnesota , on Wednesday, while Alton Sterling was killed by police a day earlier in Baton Rouge, Louisiana.

Both incidents were captured on video, reigniting what has become a national debate.

***
09:25

Four Dallas police officers have been shot dead by sniper fire during protests against the shooting of black men by police, the authorities say.

One suspect is in custody after a shootout with police, while a person of interest turned himself in, Dallas police tweeted.

Gunfire broke out as demonstrators marched through the city.

The protests were sparked by the deaths of Philando Castile in Minnesota and Alton Sterling in Louisiana.

Dallas Police Chief David Brown said 11 officers were shot "ambush style" by snipers, killing three. Police later said a fourth had died.

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