A Blackpool man has been questioned by police in connection with an armed robbery on a cash delivery van.
It is thought the 35-year-old and a 27-year-old woman from Bolton could be part of a gang, with connections to Salford, Bolton and Manchester, which raided the van near Preston last month and later led police in a chase on the M6.
A significant amount of cash was stolen when security guards were surrounded by three masked men brandishing a machete on June 12 outside a newsagents in the Ribbleton area of the city.
Police say two vehicles, thought to be connected with the incident, were later seen by motorway police heading south in the M6.
A BMW 318i and an Audi A3 were clocked on the motorway and were tracked all the way into Birmingham city centre.
Cops gave chase when one of the drivers ran a red light.
During the high-speed chase, the BMW deliberately rammed two police patrol cars before smashing into a central reservation.
The driver and a passenger were arrested as they tried to flee on foot.
One is believed to be 30-year-old man from south Manchester, and the other is a 31-year-old from the North West. They have been arrested on suspicion of robbery and theft of a motor vehicle.
The Audi and its driver are still being sought.
Detectives believe both vehicles were connected to the cash van raid.
Police investigating the incident it say are still hunting another man, aged 36 in connection with the incident.
One man from Salford has already been charged in connection with the robbery and is due to appear at Preston Crown Court in September.
The Blackpool man and Bolton woman remain on police bail, pending further enquiries.