ARSONISTS are believed to have started the fire that swept across allotments, killing dozens of animals and causing thousands of pounds' worth of damage.

The charred carcasses of more than 50 chickens were uncovered among the debris by firefighters.

Greenhouses, sheds and equipment were all destroyed in the fire at Saltersgill Avenue, Middlesbrough, in the early hours of yesterday morning.

The gardeners are now starting to count the cost of the damage caused to the three plots that were targeted by the arsonists.

Members of the self-managed Saltersgill Allotment Association are also concerned about the long-term effect of the incident on the running of the allotments.

Gisela Kogler, the treasurer of the association, said: "It was senseless, callous and careless. What is the sense in burning alive animals? It beggars belief."

Investigations into the blaze are continuing.

A spokeswoman for Cleveland Police said: "Allotments are people's hobbies and passions and they have invested time, money and effort into them.

"The fire brigade had informed us the arsonists were still on site during the blaze and officers attended but did not find anyone responsible."

Two fire crews from the Middlesbrough station spent three hours at the scene.

Station officer Steve McCarten said: "I felt really sorry for the allotment holders.

"All the corrugated iron sheds collapsed and we had to keep turning everything over to deal with the fire."