Police today urged parents to take responsibility for their children after youngsters were involved in sporadic outbreaks of violence in Bradford.

Eight juveniles and one adult were arrested in connection with public order offences last night.

Although no serious incidents of disorder occurred, officers said they were surprised at the young age of those involved in isolated incidents.

Gangs of youths congregated in the Bierley and Fagley areas where there were reports of objects being thrown at police and windows being smashed.

Firefighters from Idle were called to deal with a blaze in a car at Flawith Drive, Fagley, at 11pm, but had to allow the vehicle to burn out because of disturbances caused by youths.

A police spokesman said there were a "small number of minor and sporadic" incidents but nothing on the scale of the previous night's trouble in Ravenscliffe. No officers were hurt.

In Manningham, where up to 1,000 Asian youths went on the rampage on Saturday, there was no sign of trouble or tension. The streets of Ravenscliffe - where white youths had hurled bricks at riot officers 24-hours earlier - were virtually deserted.

At about 6pm in Tong Street, one person was arrested when masked youths were seen ripping up planks of wood from pallets. Five people had been arrested in the nearby Holme Wood estate the day before after confrontations between riot police and local youths.

The police spokesman said: "Up to midnight last night there were nine arrests, mainly for the possession of offensive weapons."

Chief Superintendent David Collins said there had been quite a number of young people on the streets and stressed that parents should be "finding out what their children are doing".

The police spokesman said the high visibility patrols were maintained through the night.

"Some of the officers involved said they were surprised at the age of the youngsters out on the street."