A fire at a tea kiosk in Whitstable on Friday night was arson, say police.
Firefighters were called to the building in Tower Hill at 10.30pm and found its thatched roof on fire.
Flames had severely damaged the building and firefighters had to cut a large section of the roof away.
Police today said the fire had been set deliberately.
Sgt Nick Barton of the Canterbury Community Safety Unit said: “We are treating the fire as suspicious and are appealing for witnesses to contact us.
“The fire is believed to have started in the rear corner of the thatched roof and will have a big impact on this popular business during its busiest time of year.
“We would like to hear from anyone who saw any people acting suspiciously in the area on Friday night, or who has information about the incident.”
If you can help, please phone police on 01843 222289 or Kent Crimestoppers anonymously on 0800 555111 quoting reference 12-0038.