Fire crews managed to contain a big fire at the Port of Tauranga to two buildings.
Dozens of fire crews were called to the blaze in a mechanical workshop and an adjoining office building at about 11.30am.
The fire grew to about 20 by 12 metres in size.
Kevin Cowper, of the Bay of Plenty fire service, said there were no injuries and the fire was now under control.
"At the port they've got a good management structure and they've put their own procedures in place to look after the welfare of their people, not that anyone was injured or hurt ... and also to try and continue where possible the port operations, it's a very busy port."
A woman who works nearby, Samara, said it was a spectacular sight.
"The flames just rose up above the buildings ... the smoke must have been up like where all the planes are flying ... it was just incredible, the smoke was just huge."
Crews quickly contained the fire to the two buildings, and protected adjacent buildings and acetylene cylinders.
Earlier this afternoon, Port of Tauranga chief executive Mark Cairns said the incident was at fourth alarm level, with more than 10 appliances and 45 firefighters on site.
The cause was undetermined, but investigations would start as soon as the fire was extinguished, he said.
"We are very relieved that no one was hurt," he said.
The Tauranga Container Terminal was expected to reopen to traffic this afternoon, he said.