Electricity has been restored to a transmitter that was deliberately set on fire affecting the television and radio broadcasts to thousands of homes.
The fire service were called to the blaze at the site in Bathampton, near Bath just before 6am.
Crews extinguished the fire in three sheds at the site, but the damage caused a power cut resulting in a loss of broadcast services to around 80,000 homes in the area.
The transmitter - which also provides a mobile network service - is owned by Arqiva.
Engineers from the company had to switch off the power supply to the transmitter to assess the damage to the structure.
A spokesman said there was fire damage to multiple feeders, which carry the digital signals between the antenna and transmitter.
A fire at a transmitter site near Bath has affected television and radio broadcasts to thousands of homes. The damage caused a power cut, which engineers are working to fix.
A spokesman for Avon and Somerset Police said: "At this stage we believe it may have been started deliberately. It is not known exactly where the fire started, however we are appealing for anyone who saw people acting suspiciously in the area in the early hours to contact police on 101."
The transmitter is owned by the communications company Arqiva, who have engineers on site. The company said services have been temporarily switched off to enable safety work to take place. We are working on getting the transmitter back in full service so transmissions can be resumed."
A fire at the site of the Bath transmitter has affected TV and radio broadcasts to thousands of homes. Crews were called to the site in Bathampton just before 6am. They put out the fire, which they believe may have been started deliberately, but it caused a power cut which engineers are working on.
Freeview TV channels, local radion and national analogue and digital radio channels have all been affected.
Sky customers are unaffected, as are people in the south of the city who are served by the Mendip transmitter.
A serious fire at the Bathampton transmitter site has meant all freeview television channels, digital radio channels and national analogue channels have been cut off. Avon Fire & Rescue say three fire engines were sent to the site to tackle the fire.