Sefton Central Labour MP Bill Esterson has praised police for their swift action following a robbery at Bargain Booze in Maghull.
Police were alerted to a robbery at the Liverpool Road shop at 7.30pm on Thursday (August 21).
An eye witness told how she heard a crash followed by a black BMW speeding away from the store.
Moments later, Sefton Central Constituency Labour Party chairman, Andy Wilson, who was parked at the traffic lights at the junction of Liverpool Road North and Westway, saw the car mount the pavement heading towards Central Square and driving at speed on the pedestrian walkway past HSBC.
He told MP, Bill Esterson and Sudell Ward Labour councillor Patrick McKinley that "it was a miracle no one was hit by the car".
Andy told Mr Esterson and Cllr McKinley: "I was just sitting at the lights when I heard the sound of screeching tyre. When I looked over I just couldn't believe what I was seeing. The dark coloured BMW just drove onto the pavement and then proceeded to travel at speed on the pedestrian section towards the square.
"It was lucky there were no pedestrians because it was a blind bend and anyone, a pensioner or even a small child would have stood no chance if that came hurtling around the corner at that speed.
"I initially thought there was a fire because there was what I thought was smoke all along the road, but I then discovered that the people in the car were setting off a fire extinguisher as they were driving.
"I was in shock. But thankfully the police were not too far behind.
"A little later, I was in the square and I saw the fire extinguisher had been thrown into the centre. I called the police and while I was on the phone they checked it on the CCTV cameras and less than two minutes later, a police car was on the scene.
"I'm just thankful that no one was hurt. Seeing the dangerous way the car was on the pavement, it could really have been a tragedy."
Sefton Central Labour MP Bill Esterson praised the police.
Mr Esterson said: "The police response team appear to have been at the scene within a matter of minutes of the original report and again later on when Mr Wilson discovered the fire extinguisher in the square.
"From all accounts we are lucky there were no injuries or worse during this whole incident, particularly given the erratic nature in which the car was being driven on a public pavement. That particular pathway is well used at all times of day, it's just fortunate no one was hurt.
"I'd like to thank the police and hope that those who were responsible are brought to justice.
"I would also urge anyone with any information to come forward and speak to the police on 0151 777 3011 or Crimestoppers anonymously on 0800 555 111."
Cllr McKinley said: "An hour or so earlier then there would have been children and youngsters walking on that pathway. It really could have been a tragedy.
"This appears to be a one-off incident, but police have informed me that they have increased patrols in the area.
"I hope the staff at the shop weren't too traumatised in the incident."
A Merseyside Police spokesman said: "Merseyside Police can confirm four men have been arrested following two robberies on Merseyside on Thursday, August 21.
"At about 7.05pm officers received a report of robbery at the Co-op shop on Warrington Rd, Rainhill.
"A short time later at 7.30pm officers received a further report of robbery at the Bargain Booze on Liverpool Rd, Maghull.
"In both incidents a group of men, with their faces covered, entered the shop, threatened staff and made off with a quantity of cigarettes.
"No one was reported as injured in either incident.
"Patrols in the area were increased and following an extensive search of the area four men, aged 25, 26, 26 and 41, were arrested on suspicion of robbery. All four men are in custody being questioned by officers.
"Enquiries into the incident are on-going."