They are now investigating whether the two suspects they detained were involved in any of the other robberies committed at the two service stations in recent weeks.
The two men detained are a 17-year-old Syrian and a 28-year-old Egyptian. They left behind a number of item, including a GPS navigation systems and bottles of perfume when they fled from police. It is believed that these items had been stolen.
Half an hour earlier a lorry driver had been robbed of his smartphone by a gang of three men. The trucker was slightly injured in the incident.
A Juvenile magistrate has sent the 17-year-old suspect to a secure young offenders unit. The adult suspect has been detained on suspicion of robbery with violence, attempted robbery with violence, membership of a criminal group and being in the country illegally.