Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. The bodyguard who shot the Westminster attacker Khalid Masood told jurors “he was going to kill me” and appeared to break down in court as he said he was “certain that something terrible was happening”.The close protection officer became emotional as he described the events leading up to the moment he opened fire three times.The officer, known by his call sign SA74, said: “Immediately in front of me I was aware of shouts which I perceived and understood to be of police officers – they are very distinctive – and what we are taught from our training.”I was also aware of a number of uniformed police and members of the public running back towards me.”He said Masood was given “clear commands of ‘Get back”‘.He went on: “The uniformed police had batons drawn. The batons were extended and they were frantically moving towards me trying to get away from something or someone.”I did not know what was happening but I was certain that something terrible was happening.”He told jurors: “He was going to kill me.”Earlier, a minister’s bodyguard has told how he tried to save Khalid Masood’s life after his colleague shot him as the Westminster terrorist approached them armed with two large kitchen knives. Show more A bodyguard, identified only as SA74, shot the 52-year-old attacker three times with his Glock pistol in the Palace of Westminster on March 22 last year.From beneath the public gallery in the Old Bailey’s Court One, with the media allowed only to listen to proceedings via video link from another room, his colleague, known only as SB73, told jurors how he risked his own safety to handcuff the attacker while he lay dying on the floor.”At that time he was still breathing. His chest was still rising and falling. He was going grey,” he said.”He basically stopped breathing so I started CPR – chest compressions.”The pair have been granted anonymity during the inquest and provided “special measures” to give their evidence.Speaking about the start of the incident, he continued: “There was a large crash bang. It sounded like a car crash. Masood killed four people and seriously injured 29 others when he ploughed through pedestrians on Westminster Bridge before knifing Pc Keith Palmer to death as he guarded the Carriage Gates.The rampage took just 82 seconds and ended when two close protection officers, who had been waiting for their principal, rushed in with handguns drawn shouting warnings before one opened fire. SB73 said: “I shouted a verbal warning. I’m not sure what I actually said. I shouted some verbal warning – armed police, stop, drop the knife, something like that.”I thought he would seriously injure or kill one or both of us.”My colleague fired a number of shots which stopped the male. I heard the shots and the male slumped to the ground.”Afterwards, the officer told how he moved forward to handcuff the attacker with a police constable.The witness said he noticed Masood had two gunshot wounds to the torso.Jonathan Hough QC, for the coroner, said: “Is it right to say there was a risk given the circumstances he might have a bomb?” The officer agreed.Masood’s five victims were Pc Palmer, 48, American tourist Kurt Cochran, 54, retired window cleaner Leslie Rhodes, 75, mother-of-two Aysha Frade, 44, and Romanian designer Andreea Cristea, 31.Masood was ‘cold and clammy’ says officer who gave him mouth-to-mouthA police officer who gave mouth-to-mouth resuscitation to the Westminster attacker has told how Khalid Masood went “cold and clammy” after he was shot.Pc Andrew Dunmore was on duty at the Palace of Westminster with the diplomatic protection group on March 22 last year.He heard a “stressed” sounding radio call from a colleague asking for assistance at Carriage Gates.He was heading to the scene when he heard gun shots, the witness said.The officer told jurors he initially thought an attacker was standing over an officer until he noticed the suited man was holding a Glock, a firearm commonly used by police.The armed close protection officer also identified himself, the Old Bailey heard.Pc Dunmore, an enhanced first-aider, examined the suspect on the ground and found two gunshot wounds to the chest.He said: “There were signs of life. His eyes were rolled back to the back of his head and flickering.”I was unable to find his pulse and started CPR. I continued the mouth-to-mouth on the suspect.” “I started hearing shouting and screaming from the direction of where the crash had been.”We started moving towards the gates.”There was obviously something going on – shouting and screaming and panic that was around in the air – so we headed towards the gates to see what was going on.”There were lots of people running towards us at that stage. My colleague shouted ‘knife’.”They saw terrorist Masood with a large kitchen knife in each hand, four to five metres away and walking fast towards them. The inquest heard he was joined by a doctor, and a defibrillator was called for after a first one was found to be faulty.Pc Dunmore said: “He started to deteriorate. He started to go cold and clammy and unresponsive and his eyes went to the back of his head.”Paramedics arrived and Masood was taken to St Mary’s Hospital at 3.21pm, with CPR continuing in the ambulance.Pc Keith Palmer died at the scene at 3.14pm, having been stabbed by Masood, who was armed with two knives.Pc Dunmore said he put cones around Masood’s knives and placed a blanket around Pc Palmer’s body to preserve his dignity.Earlier, he had told a group of teenagers with mobile phones outside the railings to move back and out of danger.Masood suffered three gunshot wounds, one “through and through” to the right hand and two to the chest, Dr Simon Poole said.The pathologist retrieved two bullets from the body and found internal injuries.He said the fatal gun shot was to the front of the chest and had damaged the heart and lung.Cause of death was given as gunshot wound to the chest.