At 7.40pm on Wednesday (28) crews were called to a fire on Old Great North Road in Stibbington, following reports of an explosion.
Crews from Stanground, Dogsthorpe, the Peterborough Volunteers Fire Brigade, Whittlesey, St Neots and Stamford in Lincolnshire attended the incident.
Firefighters arrived to find a fire in a factory unit. Wearing breathing apparatus they extinguished the fire using a hose reel and jets.
All persons were accounted for.
The crews remained at the scene until around midnight. An investigation is underway to determine the cause of the fire.