Ten people are in custody after three police officers were injured in a late-night Guy Fawkes incident in Dunbartonshire.
Some crews were attacked by youths
It was the most serious outbreak of violence on a night which saw fire crews come under attack in various parts of Scotland.
The clash began at 2355 on Wednesday when a group of youths began throwing stones at firefighters in Freelands Road, Old Kilpatrick.
Three police officers from Clydebank went to the scene and suffered face and head injuries. One, a 29-year-old constable, is being treated for a broken jaw.
Superintendent Ewen MacLellan, deputy divisional commander, said: "This appears to be an outbreak of completely reckless and violent disorder which has led to three of my officers requiring medical treatment, one of whom remains in hospital."
The 10, nine adults and a juvenile, are due to appear at Dumbarton Sheriff Court on Friday.
Strathclyde Police responded to a total of 201 firework-related incidents during the 24 hours from 0700 on Wednesday. The figure for the same period in 2002 was 257.
Elsewhere, a fire engine's windscreen was broken by a stone in Calderwood, East Kilbride.
There were also attacks in Fife and crews had to wait for police protection before continuing their work.
In Ayr, one firefighter was taken to hospital for treatment after a bottle exploded as he tackled a bonfire.
In the Toryglen area of Glasgow, an elderly man and woman and a 45-year-old woman were taken to hospital after a firework went off in their kitchen.
It is not yet clear whether or not the firework was thrown into their flat deliberately and Strathclyde Police are investigating the incident.
Lothian and Borders Fire Brigade received 600 calls on Wednesday night.
There were fears for the safety of crews tackling fires on Arthur's Seat, with one fire burning at the edge of a sheer drop.
One woman suffered minor burns at a display in Meadowbank stadium.