A WARPED sniper who gunned down cops in cold blood was blown up by an explosives-packed bomb disposal robot.

Ex-US Army reservist Micah X Johnson, 25 — who served in Afghanistan — died in the showdown hours after five male officers were slain in Dallas, Texas.

35 Micah X. Johnson told police he wanted to kill white people, especially white police officers Credit: Facebook

35 Micah Johnson, seen here in army fatigues, told police during negotiations that he was acting alone

35 A policeman lies on the ground after apparently being shot during a sniper attack in Dallas Credit: Dallas KDFW

35 One horrific video caught the moment a hero police officer was shot execution-style as he tried to fight back against the attackers Credit: Fox News

35 TV cameras caught the moment a man wearing a bullet-proof vest was arrested by armed police in Dallas

35 It is not yet known whether the man was linked with the violence in the city that saw five police officers shot and killed

35 Five cops were killed while seven more were wounded during the Black Lives Matter rally in Texas Credit: AP:Associated Press

Johnson, who had posed online doing a Black Power salute, told cops he had laced the city centre with explosives because he wanted to kill “white people, especially white officers”.

And he chillingly warned: “The end is coming.”

After he refused to deal with negotiators, police turned to the robot to keep other officers safe.

Last night three other suspects were still in custody after the massacre at the Black Lives Matter march at Belo Garden in Dallas. Seven other cops were injured, some critically.

Two civilians were also hurt, including a mum shot in the leg.

Last night Dallas Mayor Mike Rawlings said Johnson was thought to be a lone gunman.

He said: “We believe now that the city is safe and that the suspect is dead and we can move on to healing.”

Details were also emerging of Johnson’s creeping radicalisation, his growing fury with the US authorities and their treatment of black Americans.

His name is thought to be modelled on 1960s radical black American activist Malcolm X.

35 One man was involved in a stand-off with police in a parking garage. He shot himself after first threatening SWAT teams with bombs Credit: AP:Associated Press

35 The violence follows the deaths of two young black men by police this week. Footage of the two killings provoked outrage across America Credit: AP:Associated Press

35 Terrifying footage of the "ambush" emerged as police ducked for cover behind their cars Credit: Fox News

35 A man is treated by desperate officers following the gun attacks in Texas. Five officers were shot dead during the assault Credit: Dallas KDFW

35 Shots rang out around 8.45pm local time last night. The terrifying moment was caught on camera as civilians fled for cover Credit: AP:Associated Press

Photos on his Facebook page showed him posing with his fist raised in a distinctive Black Power salute, with another showing the Black Liberation flag.

A Twitter account under his name, set up in May, followed just six other accounts including the radical New Black Panther Party.

Last Saturday he posted: “Why do so many whites enjoy killing and participating in the death of innocent beings.”

35 The Black Power Political Organisation claimed responsibility for the attack, warning there would be more to come Credit: Facebook 35 The group's Facebook page has since been deleted from the social media site Credit: Facebook Days before the massacre Johnson’s sister Nicole, 21, posted on Facebook: “White people have and will continue to kill us off. I for one think these cops need to get a taste of the life we now fear.” Pictures of Johnson, who left the Army in 2015, showed him in military uniform while others appeared to show him in fatigues brandishing handguns with laser sights. Officials say Johnson was a soldier in the US Army reserves from March 2009 to April 2015. He was deployed to Afghanistan in November 2013 and returned in July 2014 and was awarded the Army Achievement Medal. Johnson had an assault rifle and a handgun and was wearing body armour when he died, law enforcement officials confirmed. 35 Police crouch behind their cars as they come under fire in the street from unseen snipers 35 Heavily-armed police responded to the gunshots last night as the full horror of the shootings emerged Credit: Getty Images

35 A victim is treated by paramedics as emergency services race to save those injured during the rampage Credit: AP:Associated Press

35 One of the suspects was holed up inside the car park of a nearby college Credit: AP:Associated Press

35 He reportedly threatened police with bombs before shooting himself dead in the early hours of Friday morning Credit: AP:Associated Press

35 Heavily-armed SWAT teams descended on the city to regain some order as it emerged at least one of the attackers was wearing armour Credit: AP:Associated Press

35 Names of the police injured and killed in the attacks began to emerge on Friday morning Credit: AP:Associated Press

35 President Obama labelled the shootings "despicable" as he addressed America from the Nato summit in Poland this morning Credit: Getty Images

35 Police officers paid a heart-wrenching tribute to their killed colleagues as the full scale of last night's attack became apparent

Cops who raided the home in the Dallas suburb Mesquite that he shared with his deeply religious mother Delphene found bomb making materials, rifles, bulletproof vests and ammunition.

Reports last night revealed Johnson also has a white stepmother after his father James remarried.

Teacher Donna Ferrier Johnson proudly shared pictures of her stepson in uniform on Facebook.

Photos suggest Johnson’s father James was also in the military. Yesterday Nicole told of her grief.

She told pals on Facebook: “I keep saying it’s not true . . . my eyes hurt from crying. Y him?” The horror unfolded as 800 people gathered to protest at the deaths of two black men, Philando Castile and Alton Sterling, at the hands of cops in Minnesota and Louisiana this week.

As the march neared its end at 9pm — 2am in Britain — gunfire rang out. Detectives said shots rained down from elevated positions, calmly picking off uniformed targets from behind.