UPDATE, Wednesday, 8.30am: A STOLEN charcoal coloured 2015 Ford Territory was involved in a police pursuit which reached speeds of more than 150km/h in a 60 zone at Mailors Flat.
Detective Senior Constable Richard Hughes, of the Warrnambool police crime investigation unit, was waiting at the intersection of Caramut Road and the Mailors Flat-Koroit Road at 6.10pm Tuesday when the stolen car was driven past.
"The stolen car was seen near the Warrnambool Stadium in Caramut Road and was heading north on the Caramut Road," he said.
"A pursuit was initiated after it past us but abandoned after the stolen vehicle overtook other cars. It was being driven at more than 150km/h through the 60km/h zone at Mailors Flat."
Detective Senior Constable Hughes said police continued north along Caramut Road after the pursuit was terminated to see if the stolen car had been involved in an accident.
"The driver did a U-turn back towards Warrnambool and was being driven in a similar manner," he said.
"Another pursuit was not initiated due to safety concerns."
Detective Senior Constable Hughes said police urgently wanted to know the whereabouts of the grey Ford Territory - registration plate number 1FJ-6SN.
Anyone with information about the $40,000 Ford Territory, which was stolen from near Merino on Sunday, is requested to urgently contact triple 0.
Tuesday: A grey 2015 Ford Territory - with registration plates 1FJ-6SN - stolen in the Merino district is believed to have been seen near Milltown at 8am on Tuesday.
Detective Senior Constable Jarrod Anderson, of the Portland police crime instigation unit, said officers were following up the possible sighting at 8am of the $40,000 vehicle.
He said there were reports a woman was seen on the road and a man encouraged her back into the vehicle before he drove away.
Anyone who sees the vehicle is urged to urgently contact police on 000.
Monday: PORTLAND police are chasing thieves after three vehicles valued at $65,000 were stolen, two of them torched and one was involved in a police chase at Hamilton.
It's understood the thefts are all linked and possibly tie into other crimes committed in South Australia.
Detective Sergeant Jason von Tunk, of the Portland police crime investigation unit, said a maroon Subaru Impreza valued at $20,000 was stolen from Cape Bridgewater on Saturday morning.
"That vehicle, with registration plates ZOL-611, was then involved in a pursuit on Saturday morning in Hamilton involving uniform police members," he said.
"The pursuit was terminated and the Impreza was later located in Merino burnt out."
Detective Sergeant von Tunk said a grey 2015 Ford Territory - with registration plates 1FJ-6SN - was then stolen in the Merino district.
"That vehicle, valued at $40,000, is still outstanding and we are seeking information from the public about the whereabouts of the Ford Territory," he said.
"Another car, a 2003 Toyota Camry sedan valued at $5000, was also reported stolen from Otway Street in Portland."
The detective said the Camry was found burnt out near the intersection of Gorae Road and Surrey River Road at Gorae West in north Portland during the early hours of Sunday morning.
"Before being destroyed, that vehicle was driven very erratically and deliberately crashed into numerous road signs," Detective Sergeant von Tunk said.
"We are pursuing a number of lines of inquiries and the same offenders involved in stealing the vehicles have also been linked to crimes in South Australia."
Detective Sergeant von Tunk requested anyone with information about the stolen vehicles and those involved to contact the Portland police station or Crime Stoppers on 1800 333 000.