The brother of serial killer Steve Wright claims arsonists attacked his business following a documentary about his sibling.
55-year-old Steve Wright killed five prostitutes and dumped their bodies in rivers around Ipswich in 2006.
A programme about the case was shown on Channel Five on Wednesday night. Wright's brother David claims it provoked arsonists to set fire to one of the cabins at his portable building business in Stanningfield.
Suffolk Police have confirmed that they are investigating a suspected arson attack at the property.