Fire crews have brought a fire near Smiths City in central Christchurch under control.
Emergency services were alerted to the fire on Welles St about 6.30pm.
A Fire Service spokesman said six fire engines had been sent to battle the blaze.
"They're just working to keep it contained. We're just warning the public to keep well back," the spokesman said.
It was too early to say whether the blaze was suspicious. The building was unoccupied.
The spokesman believed the fire was the same building set alight in a suspicious fire last week.
An empty site on Welles St was gutted in last week's fire.
Afterwards, the owner of a nearby business told The Press he had problems with youths breaking into the vacant building, and he thought the fire may have been started deliberately.
- The Press