The police officers who shot 12-year-old Tamir Rice while he was holding a BB gun did not give him first aid and watched him lie in agony for four minutes, Cleveland authorities have revealed.

Footage shows rookie Timothy Loehmann shooting the youngster within two seconds of his squad car arriving at the scene last weekend following a 911 call that said the weapon was 'probably fake'.

However the video does not show how him and his colleague Frank Gramback reacted.

ABC 5 have reported that the boy did not receive medical attention until four minutes after the shooting in the Ohio city, with two other officials coming to the scene to give the boy help.

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Evidence: This still image taken from a surveillance video played at a news conference held by Cleveland Police, Wednesday shows Cleveland police officers arriving at Cudell Park on a report of a man with a gun

Surveillance footage shows 12-year-old Tamir raising and pointing his replica gun as he walks through a park in Cleveland, Ohio on Saturday. Just moments later, he was fatally shot by police

'Threat': Rather than raising his hands, he puts one of his hands at his waistband

Hit: The youngster - who cops thought might be about 20 - doubles over as he is shot by a police officer

Response: The officer can be seen kicking away the gun as the boy is on the ground. They called for back up

A detective and FBI agent who were in the area responded to the call for help and began giving medical help to Rice three minutes and 49 seconds after he was hit, Deputy Chief Ed Tomba said.

Dan Williams, a spokesman for Mayor Frank Jackson, said all of the officers' actions are under investigation. Two of the officers are on administrative leave.

He added that he was unsure of the regulations when it comes to giving medical help to a police shooting victim.

Tamir's family said in a statement released by their attorneys that they hope Cleveland police and Cuyahoga County prosecutors 'thoroughly examine' what happened at the park that day.

'It is our belief that this situation could have been avoided and that Tamir should still be here with us,' said the family. 'The video shows one thing distinctly: the police officers reacted quickly.'

Gunned down: Tamir Rice, 12, was fatally shot by police on Saturday and passed away on Sunday

On Saturday, a person had called 911 about a male pointing a gun at others at the park. The caller told the 911 dispatcher that the gun was 'probably fake,' then added, 'I don't know if it's real or not.'

Newly-released audio showed that the dispatcher did not pass on this concern to the responding officers

The patrol officer who shot Tamir was identified Wednesday as Timothy Loehmann, a 26-year-old rookie who has been on the force in Cleveland for just a little over eight months.

He previously spent five months in 2012 with a department in suburban Independence, but four of those months were in that city's police academy.

Loehmann's partner that day was identified as Frank Garmback, 46. He has been with the department since 2008. Both are on paid administrative leave pending a decision by the Cuyahoga County prosecutor's office whether to pursue any criminal charges.

Much of the video footage shows Tamir wandering alone in a park on an unseasonably warm November afternoon. He is seen pacing, occasionally extending his right arm with what appears to be a gun in his hand, talking on a cellphone and sitting at a picnic table with his head resting on his arms.

The black gun in his hands was a fake. It can be bought at sporting goods stores for less than $20. Tamir's was lacking the orange safety indicator usually found on the barrel and, from a distance, was indistinguishable from a real firearm.

'The guy keeps pulling it out of his pants and pointing it at people,' the 911 caller told the dispatcher, adding that it was 'scaring the s***' out of him.

'I don't know if it's real or not,' he added

Shooting: On Sunday, Tamir's father, Gregory Henderson, said the youngster had his whole life ahead of him when he was gunned down outside Cudell Recreation Center. Above, the BB gun that Tamir was carrying

Heartbroken: Pictured here is Sam Rice, Tamir's mother. A lawyer representing her family said Tamir would have been alive today had the officer not opened fire so quickly

Hands up: Police say the 12-year-old, pictured here with his mother, Sam, and a sibling, failed to comply with the officer's order to raise his hands

The female dispatcher then put out a call for officers, but did not tell them that the weapon might be a fake, audio showed. Officers headed to the scene.

On the footage, the 911 caller then leaves the gazebo and the boy heads beneath the shelter, with the gun visible in his hand. Again, he can be seen raising the gun and pointing it as he walks around.

At one moment, Tamir is sitting at a picnic table in a gazebo. He stands and a police car zooms into the frame from the right and stops on the grass, just a few feet from Tamir.

The passenger door swings open and Loehmann opens fire on Tamir before Garmback can get out the driver's side door.

While the car was was pulling up, Loehmann yelled through his open door three times, telling the boy to raise his hands, but Rice did not follow the order, Deputy Chief Tomba said. The footage has no audio.

It's unclear how far the boy was from Loehmann when the officer shot him, but Deputy Chief Ed Tomba said Wednesday that it was less than 10 feet.

The low-resolution video shows Tamir - who the cops thought was about 20 years old - reaching to his waistband and then bending over after being shot. His body is mostly obscured by the patrol car when he falls to the ground.

Mrs Rice took to Facebook after learning of her son's shooting at the hands of a Cleveland police officer

Grateful: Mrs Rice tanks her supporters for their prayers that have been sustaining her and her family

'Shots fired,' one of the officers tells the dispatcher on another call. 'Male down, black male, maybe 20, black hand gun.'

Officer Garmback can be seen walking around the car and kicking what is said to be the airsoft gun away from Tamir.

Tomba told reporters at a news conference Wednesday that an FBI agent who was working a bank robbery detail nearby arrived within a few minutes and administered first aid to Tamir. Paramedics arrived three minutes later.

The boy succumbed to his injuries Sunday at a Cleveland hospital.

Tomba said the city was releasing the video at the behest of Tamir's family.

'This is not an effort to exonerate. It's not an effort to show the public that anybody did anything wrong,' Tomba said. 'This is an obvious tragic event where a young member of our community lost their life. We've got two officers that were out there protecting the public that just had to, you know, do something that nobody wants to do.'

Shooter: Timothy Loehmann, pictured left at his swearing in ceremony, fired the fatal shot on Saturday

At the wheel: Frank Garmback, 46, was driving the police cruiser when his fellow officer shot the child

'IT'S PROBABLY A FAKE': 911 CALL Cleveland police officers were alerted to the park after a man called 911 on Wednesday afternoon. He told the dispatcher that he had seen a man, who was wearing a camo hat and a gray jacket, waving a gun around. 'The guy keeps pulling it out,' he said on the call. 'It's probably fake, but you know what, he's scaring the s*** out of (inaudible). 'He's sitting on the swing right now, but he keeps pulling it in and out of his pants and pointing it at people. 'Probably a juvenile, you know? 'I don't know if it's real or not, you know?'' Advertisement

Tomba would not discuss statements the two officers gave after the shooting, saying they were part of the investigation. Nor would he discuss details of the radio conversation between the officers and a dispatcher except to say they were apprised that they were on a 'gun run.'

David Malik, one of the attorneys representing Tamir's family, said Wednesday that he hoped the shooting of Tamir would lead to reform. He cited Cincinnati, where he said the police department, police union and the community worked collaboratively.

'Hopefully, incidents like this won't occur again,' Malik said.

Tomba said that Officer Loehmann, who only joined the team March 8, was on his shift with Garmback, a certified training field officer.

Both of the officers have given statements and are on administrative leave. He said that the call from the dispatcher was also under investigation.

Cleveland Deputy Chief of Police Edward Tomba narrates the 911 call audio and surveillance video on November 25

Cleveland Police Chief Calvin Williams said he spoke to Loehmann and said he 'is broken up about this'

But in response to questions over her failure to mention the gun could be fake, he said dispatchers had to strike a balance between 'the need to get information to that zone car with the need to give every bit of information that we can'.

With Tamir on the ground, Loehmann kicks away the replica gun, which was dropped on the floor as the boy fell.

'Shots fired,' one of the officers tells the dispatcher on another call. 'Male down, black male, maybe 20, black hand gun.'

In fact, it emerged that the boy was just 12 and was carrying a replica 'airsoft' gun.

Airsoft guns fire spherical plastic pellets and have orange tips to show they aren't real firearms, but police said the one the boy had didn't have the bright safety indicator, making it indistinguishable from a real firearm.

Tomba said that Loehmann, who only joined the team in March, was on his shift with Garmback, a certified training field officer.

Devastated: Family members of Tamir Rice embrace after final prayers during a rally November 24 at Cudell Commons Park in Cleveland

Both of the officers have given statements and are on administrative leave. He said that the call from the dispatcher was also under investigation.

But in response to questions over her failure to mention the gun could be fake, he said dispatchers had to strike a balance between 'the need to get information to that zone car with the need to give every bit of information that we can'.

Records show that Loehmann graduated Benedictine High School, a Catholic school in Cleveland, and studied at Tiffin University, a private co-educational university in Tiffin, Ohio.

He later gained a BA in Criminology/Sociology from Cleveland State University and went on to attend the Cleveland Heights Police Academy.

He was sworn in as a full-time police officer in Independence, Ohio, by the city's mayor Mark Buehner, in July 2012, and started as a city police officer in Ohio in March 2014.

Anger: Demonstrators block Public Square in Cleveland on Tuesday as they protest the boy's shooting

The family's attorneys saw the video of the shooting on Monday, a day after Tamir died, and agreed for the full footage to be released publicly.

Officials had been withholding the video, saying that it was evidence in the investigation and that they wanted to be sensitive to the family, the community and the officer, whom they said was distraught.

Earlier this week, Cleveland Police Chief Calvin Williams said he spoke to Loehmann and said he 'is broken up about this' and 'didn't want to do this, but had to protect himself'.

The police department will now present the footage and other evidence to the county prosecutor's office. Prosecutors will then present the case to a grand jury, which will decide whether the officer was justified in using force against the boy.

On Tuesday, several hundred people marched down an exit ramp and temporarily blocked rush-hour traffic on a busy freeway in protest of the incident.

Police diverted traffic but didn't take action against the protesters, who chanted phrases such as 'Hands up, don't shoot' and 'No justice, no peace' as they sat in a major intersection. One man was seen being arrested and dragged away by cops.

Arrest: Cleveland police arrest a protester in Cleveland during the demonstration for justice for Tamir

Standing up: Police watch the demonstrators on Tuesday, a day ahead of the release of video of the incident

The demonstration came as people across the country continued to protest a grand jury's decision this week not to indict a white police officer, Darren Wilson, who killed an unarmed black teenager, Michael Brown, in Ferguson, Missouri in August.

The crowd in Cleveland blocked the freeway for about an hour before returning to a downtown square, where it dispersed. The demonstrators passed by the Cuyahoga County jail, causing inmates to bang on their windows.

The shooting of Tamir Rice has led to an investigation of the officer's use of force and protests referencing this and other police-involved shootings.

An attorney for the boy's family, Timothy Kucharski, said Tamir went to the park with friends on Saturday afternoon, but he did not know the details of what led to his shooting.

'This is not a black and white issue,' he said. 'This is a right and wrong issue. This is not a racial issue. This is about people doing their jobs the right way.'

On Sunday Tamir's father Gregory Henderson said the youngster had his whole life ahead of him when he was gunned down.

Too young: Tamir's father said he was distraught over the death of his 'superhero', Tamir (pictured), whom he described as a keen basketball player who was tall for his size, polite and 'very artistic'

Scene: Investigators gather at the scene of the shooting after Tamir was fatally wounded on Saturday

Wiping away tears, he said: 'Who would've thought he would go so soon? He had his whole life ahead. To be 12 years old, he doesn't know what he's doing. Police, they know what they're doing.'

'I'm trying not to cry about the situation but the situation hurts,' he told WKYC.com, adding that he wished police had Tasered his son instead of immediately shooting him.

He added that he was still shocked at the death of his 'superhero', whom he described as a keen basketball player who was tall for his size, polite and 'very artistic'.

The incident has also contributed to a state lawmaker's plan to propose legislation requiring all BB guns, air rifles and airsoft guns sold in Ohio to be brightly colored or have prominent fluorescent strips.