A Country Fire Authority investigator and Warrnambool police detectives will on Thursday morning look into the cause of a blaze near Framlingham on Wednesday.

The fire began around noon and 10 CFA units as well as two fixed-winged bombers and a helicopter and took until late afternoon to bring under control.

Initial fears are that the fire was deliberately lit and the officials will visit the scene this morning to conduct an examination.

The blaze spread to multiple locations across the Framlingham Forest with the largest about five hectares in size.

Wednesday, 5.15pm: Warrnambool incident controller Richard Bourke praised the quick responses from crews as an important factor in saving culturally significant Indigenous sites.

"The crews did a great job working in a culturally sensitive site and to protect the area," he said.

"The quick response and the weather certainly helped."

The grassfire began around 12pm and 10 vehicles responded including two fixed-winged bombers and a helicopter.

Mr Bourke said the fire spread to multiple locations across the Framlingham Forest with the largest blaze spreading to around five hectares.

He said fire crews worked through the afternoon and into Wednesday evening to ensure the area was safe.

Earlier 4.20pm: The grassfire near Framlingham is now under control.

VicEmergency said the fire was contained at 3.50pm and a total of 10 vehicles attended the scene.

Earlier 2.25pm: A blaze is burning out of control near Framlingham.

VicEmergency said the grassfire began at 1.55PM on Wednesday and was situated 4.5 kilometres south of Framlingham at the Framlingham Forest Road but there was no threat to residents.

This grassfire is travelling from Framlingham Forest in a southerly direction towards the Hopkins River.

There are 10 vehicles responding to the blaze.

The VicEmergency advice message was issued for Framlingham to keep the roads clear for emergency services.

Smoke may be visible from nearby roads and communities surrounding the fire.

The out-of-control blaze follows another fire which began at 12.44PM but is now under control.

A total of 14 vehicles responded to the initial blaze.

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