Officers from Southern Metro Crime Team have arrested a 19-year-old Patterson Lakes man over an aggravated burglary and a string of car thefts.
Members were investigating a car theft in Armadale where a Jeep was stolen from an address on Monday night.
Detectives believe the same offender then attended an address in Pleasant Road, Hawthorn East early Tuesday morning, broke into the premises and stole the keys to a Mercedes sedan.
The Mercedes was then stolen from the property.
Police allege the same offender was seen in another Mercedes, again believed to be stolen, driving along the Monash Freeway at up to 200 km/h around 1am this morning.
The 19-year-old was arrested in Patterson Lakes about 1.45am and is currently assisting police with their enquires.
A 16-year-old Mornington girl, who was with the Patterson Lakes man at the time, was also arrested and is assisting police.
