Almost 60 firefighters are battling a blaze at a hospital in north London.
Eight fire crews rushed to the scene at Chase Farm Hospital in Enfield at just after 10.10pm on Sunday.
London Fire Brigade said a "small part" of the two-storey building's ground floor was alight.
It is not yet known whether anyone was evacuated as a result of the blaze, but fire crews remain at the scene.
A spokeswoman for LFB said: "Eight fire engines and 58 firefighters and officers have been called to a fire at a hospital on The Ridgeway.
"Fire crews from Enfield, Southgate, Edmonton, Chingford and Barnet fire stations are at the scene.
"The cause of the fire is not known at this stage."