Firefighters have extinguished a major blaze at a scrap metal recycling factory in Limerick city.

Ten units of Limerick and Clare Fire Service, including a 100ft aerial appliance, attended the scene at United Metals on Ballysimon Road.

They brought the fire under control in the early hours of this morning and it was extinguished by 6.30am.

The alert was raised shortly after 8pm yesterday evening.

Limerick Fire Service has said the damage caused to the building was minimal, and it is understood no one was inside at the time the fire broke out.

It is not yet known how the fire started but investigations will be carried out by gardaí.

However, it is not believed to be suspicious.

Local people have been urged to keep all doors and windows closed as a precaution.

United Metals has been operating since 2010.

It also operates from a site at Limerick Docks, where it recycles waste that is shipped to mills all over the world.