Senior Constable Brown said two attempted break-ins occurred on the same night, in Pearl Bay Avenue and Davidson Parade, Cremorne.
As reported last week, police are tackling a spate of local break-and-enter offences, where high-performance vehicles are being stolen from lower north shore homes.
Senior Constable Brown said increased patrols are underway across the North Shore.
“We have proactive unmarked cars, with plain clothes police all over the lower north shore,” she said.
“Added to this is our fleet of Highway Patrol vehicles which are concentrating on major arterial roads like Spit Rd and Military Rd.
“We ask that anyone who sees a high-performance car on the road late at night be alert.
“If you see one of these luxury vehicles speeding, or driving erratically, call the police.”
Senior Constable Brown also asks residents to make sure their CCTV and home security systems are in working order.
If you see anything suspicious, contact Crime Stoppers on 1800 333 000.