Police are appealing for witnesses after a derelict building was set alight in Ipswich.
The incident happened in Albion Wharf on Thursday, at about 5.30pm.
Three young people were seen in the area around the time, although it is unknown if they were connected to the incident.
Police are reminding people of the dangers of entering disused buildings that can be unsafe.
Anyone with information should contact Pc Daniel Fisk from Ipswich on 101 quoting IC/13/2637, or Crimestoppers anonymously on 0800 555111.
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