A wooden clothing bin outside a Salvation Army store was set alight in a suspicious fire early yesterday.
The Fire Service was called to the rear of the Princes St store after a passer-by reported the fire shortly after 3am.
Southern Region fire safety officer Barry Gibson said the destroyed wooden bin housed drop-off items for the store, and the fire was being treated as being "deliberately lit".
No accelerants appeared to be used, he said.
The wall lining of the building was damaged and there was a smell of smoke in the charity shop.
Several hours earlier, the Fire Service was called to put out a fire in a wheelie bin, which was set alight in Tomahawk Rd, shortly before midnight.
Mr Gibson said both fires were being treated as suspicious and it was not known if they were related.
Acting Senior Sergeant Damion Rangitutia asked members of the public who had seen anyone acting suspiciously in the areas about the time to contact Dunedin police.