Merseyside Fire & Rescue Service is in attendance at an incident at Alexandra Drive, Liverpool.
Crews were alerted at 4.30am and on scene at 4.37am. Six fire engines are on scene.
Crews arrived to find a three-storey building measuring approximately 20m by 20m involved in fire.
External firefighting immediately commenced using two high pressure hose reels.
The incident has been divided into sectors and breathing apparatus is being used. Crews are continuing to fight the fire externally using a hose reel jet and two main branches.
Please avoid the area. Residents and businesses nearby should close windows and doors. Those with existing medical conditions should keep treatments nearby and if any ill effects are experienced, dial NHS 111 for advice.
The incident is ongoing.