A London hospital has partially re-opened its accident and emergency department following a power failure.
The Royal Free Hospital in Hampstead, north London, said it was still diverting ambulances after "a major internal incident" at 0845 BST.
A statement said the electrical fault had been corrected and main power supply has been restored but was still being tested.
A hospital spokesman said the A&E department was seeing walk-in patients.
She said: "The mains power supply has now been re-established.
"Although the power supply has returned, it is being tested and A&E will not be re-opened to ambulances until the trust is assured that the power supply is secure."