A critical incident was declared at a major city hospital - after it was evacuated and patients urged to stay away.

Multiple fire engines and police on horseback have been pictured at the Bristol Royal Infirmary (BRI) after what bosses described as a 'power outage'.

University Hospitals Bristol and Weston NHS Foundation Trust said it was affecting its hospitals in Bristol city centre.

The Trust runs multiple sites in the city's centre including The Bristol Royal Infirmary (The BRI), Bristol Royal Hospital for Children, St Michael's Hospital and Bristol Eye Hospital.

Interim chief medical officer at UHBW Dr Rebecca Maxwell said: "We have declared a critical incident due to a power outage. We aim to have this fully resolved as soon as possible."

"All patients, visitors and colleagues are safe."

"We ask the public not to attend our Bristol city centre hospitals until the incident is resolved and use alternative services in the area."

"We thank you for your cooperation."

Avon Fire and Rescue Service said there were currently 10 appliances in attendance outside the hospital.

Avon and Somerset Police have also attended and are managing road closures.

People needing urgent medical help are being advised to contact NHS 111.