Tragic, tragic news coming out of Dallas tonight...
(Sky News) Three police officers have been shot dead by what appears to be two snipers at a protest in Dallas, Texas, police say.
The gunshots were heard at Belo Garden Park around 8.45pm local time.
TV showed protesters scrambling for cover and police officers crouching behind parked cars. Some were running into a parking garage with guns drawn.
Two other police officers are in surgery and three are in critical condition. Police are still searching for suspects and nobody is in custody at this time.
The gunfire came amid protests across the US over recent police shootings.
On Tuesday, music vendor Alton Sterling was shot in Baton Rouge, Louisiana, after being held down by police officers.
The following day, Philando Castile was in a car with his girlfriend and child when he was shot by an officer in Minnesota.
Both shootings were captured on mobile phones and the footage widely shared.
In New York on Thursday night, protesters gathered in Union Square Park, chanting before they moved on to Fifth Avenue, blocking traffic as police struggled to keep up with them.
Other groups headed through Herald Square and Times Square, where several people were reported to have been arrested.
Meanwhile, the police officer allegedly involved in the shooting of Mr Castile has been identified as Jeronimo Yanez.
Mr Yanez was with his colleague Joseph Kauser, both of whom had worked for the St Anthony Police Department for four years.