Three flashing safety flares – used by fire crews for safety reasons – were taken from the site of a major blaze in Wisbech last night.

Wisbech Standard: Morning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn RoadMorning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn Road (Image: Archant)

As 20 firefighters tackled the arson attack on a former motors site, no one noticed the three flares had been removed.

Wisbech Standard: Morning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn RoadMorning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn Road (Image: Archant)

Wisbech fire station used Twitter today to plead for their return.

Wisbech Standard: Morning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn RoadMorning after....photo shows the extent of the damage to former Wisbech Vehicle Exchange premises in Old Lynn Road (Image: Archant)

They tweeted: “At large fire in Wisbech 3 flashing safety flares were taken. If found please return to Wisbech fire station These are for firefighter safety.”

Such signs are often used on a approach to a fire or incident scene and used to alert passers by and direct traffic away from an area.

Today the extent of the damage at the former Wisbech Vehicle Exchange in Old Lynn Road was visible.

Around 25 firefighters were called to tackle the blaze at around 8.40pm last night.

Cause of the fire was deliberate.

Anyone with information should contact police on 101 or call Crimestoppers anonymously on 0800 555 111.