The driver of a postal van in Buckinghamshire was tied and bound after he was forced to drive at gunpoint by three armed robbers.
The driver made a delivery to the Post Office in Ballinger Road, South Heath, on Thursday morning, when three men threatened and hit him.
He was made to drive on a route ending on the A413 near Amersham, where they tied him up and fled with cash.
The driver sustained minor injuries, but was left shaken, police said.
The three men, described by police as white and in their late 50s, wore woollen hats and dust masks during the robbery.
Reward offered
The driver was forced to drive on a route from South Heath covering Great Missenden, Prestwood and to the top of Cryer's Hill in Kings Hill before returning along the same route back to Great Missenden and then onto the A413 towards Amersham.
Police urged anyone who saw the Post Office mail van along the route to contact them.
The Post Office has offered a £25,000 reward for any information that leads to the arrest and conviction of the three men involved in the armed robbery, Thames Valley Police said.
After reaching a lay-by on the A413 near the Pipers Wood junction, the men tied up the driver and fled in a white Ford Transit van, which was later found abandoned and on fire near Dr Challoner's High School for Girls in Little Chalfont.
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