Firefighters say they are on the scene of a major fire in St Leonards.
Crews were alerted at 10.45am to a blaze in the Hastings Hire Centre on Menzies Road. They arrived at the four storey building and within five minutes further firefighters were called.
Ten appliances are currently at the incident, crewed by firefighters from Hastings Bohemia Road, Hastings The Ridge, Bexhill, Battle, Rye, Lewes, Herstmonceux and Pevensey.
The fire is now surrounded by firefighters tackling the blaze. Sussex Police and the ambulance service are also attending.
One person has been taken to hospital to be treated for smoke inhalation, another treated for smoke inhalation at the scene, and two people have received precautionary checks.
The cause of the fire at this stage is unknown.
More top news
Sussex astronaut Tim Peake's space mission will be celebrated with a free exhibition at The Novium Museum in his home city of Chichester.
Emergency rescue teams are currently at the scene in East Sussex searching for another missing person.
Plenty of warm sunshine with the chance of thundery showers later.