The long arm of the law reached out and touched another long arm of the law who was allegedly being lead-footed.

On Wednesday at about 5:30 p.m., the OPP was conducting aerial traffic enforcement on Highway 115 in Cavan Monaghan township of Peterborough County.

"A motor vehicle was observed travelling northbound at a high rate of speed and was subsequently stopped by a member of the Peterborough County OPP Detachment who was participating in this road safety initiative," the OPP said in a news release issued Thursday.

"The vehicle was determined to be an unmarked police vehicle that was registered to the Durham Regional Police Service."

The OPP impounded the vehicle for seven days and suspended the driver's licence for seven days.

The officer, a 34-year-old male with 10 years experience, has been charged with racing a motor vehicle under section 172(1) of the Highway Traffic Act. He is to appear in court in Peterborough on Sept. 14.

The news release didn't give the officer's name.

OPP Const. Peter Leon told on Friday that he couldn't give an exact speed because the matter is now before the courts.

But a street racing charge means one is alleged to be travelling more than 50 kilometres per hour faster than the posted speed limit, which is 100 kilometres per hour on that stretch of Highway 115, he said.

Leon said the officer was on duty at the time, but was not responding to a call.

It isn't common to stop officers from other police forces, but "the OPP has been doing this and we've stopped our own vehicles and as a result, we've also had to charge our own members," he said. "So we're remaining transparent when it comes to safety concerns and highway safety for other motorists."