Youths stoned fire crews as they were called out to a series of unauthorised bonfires over the weekend.
Stones and lumps of wood were hurled at firefighters who were called out to blazes by youths thought to be responsible for starting the fires.
Crews attending incidents at Bishop Auckland, Spennymoor, Ferryhill and Crook, County Durham, were subjected to attacks on Saturday night. A further incident occurred in Crook yesterday afternoon.
District manager for Durham and Darlington Fire and Rescue Service, Les Greenwood, said: "On each occasion, we were called to an unauthorised, unsupervised bonfire and when crews pulled up to put out the fire, the kids took off and starting throwing debris at the personnel.
"On Saturday, we had to leave two fires to burn out themselves and called the police to stand by while the other three were extinguished.
"It is absolutely disgraceful. The fire service is here to help the community when it is in trouble, to be treated like this by a small minority is despicable.
"It is bad enough being called to unauthorised bonfires when we might be needed at other incidents."
Firefighters and police officers were kept busy throughout the region with reports of minor incidents involving fireworks and bonfires, but no other major incidents were reported.
Meanwhile, thousands of people flocked to spectacular fireworks displays across the region on Bonfire Night.
Displays on Saturday night to commemorate the 400th anniversary of the Gunpowder Plot attracted large crowds, with organisers estimating that events in Darlington's South Park and Stockton riverside each drew crowds of 80,000.
Crowds packed into Darlington town centre for fireworks in South Park, which were hailed by people who attended as "absolutely spectacular,".
It featured a performance from Darlington-born Pop Idol and pantomime star Zoe Birkett.
Also in County Durham, the streets of Sedgefield were lit up with a parade of lanterns made by local schoolchildren, who then joined 800 people for a fireworks display in Ceddesfeld Hall.
Hundreds more turned out for Spennymoor's annual bonfire and fireworks display, at High Whitworth sports field, which town mayor Christine Kennedy hailed as "the best display I've been to".
A display at Oakleaf Sports Complex, in Newton Aycliffe, was also popular.
About 4,000 people had attended an event at West Mills playing fields, in Bishop Auckland, on Thursday night.
In North Yorkshire, more than 2,000 people packed into Richmond Castle to watch the fireworks, which town mayor Stuart Parsons said were a "great success".
The Tees Valley spectacular, on Stockton riverside, drew crowds, as did the display at Redcar racecourse.
Darlington police had several reports of children being careless with fireworks in parks around the town, but there were no injuries or damage.
Cleveland Fire Brigade received 224 calls, a rise on last year, but a spokeswoman said all were minor incidents.
One woman needed hospital treatment after being hit in the eye with a firework in Reeth, Swaledale, North Yorkshire, but was not seriously injured.
In Scarborough, fireworks hit two houses, in Northcliffe Avenue and nearby Harwood Drive, but no injuries or major damage was caused.
l A ten-year-old boy was being treated for serious burns last night after a stray firework shot into the crowd at an organised display.
Eleven people, including seven children, were hurt when the pyrotechnic fizzed into spectators watching the Bonfire Night show at Wicksteed Park, in Northamptonshire.
In Leeds, six people were injured when a large commercial firework was thrown into a bar in Harehills Lane causing more than 150 individual explosions.
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