COLONIE -- The Troy police officer charged with drunken driving while off-duty Saturday was arrested after he crashed his truck into a Colonie police transport van, Colonie police Deputy Chief John Van Alstyne said Monday.

Kevin P. McKenna, who was sworn in as a Troy police officer in July 2015, was charged with driving a motor vehicle while intoxicated and without an inspection certificate shortly after 12:30 a.m. Saturday, according to a Colonie Police Department arrest report.

The arrest report, released Sunday, did not mention the crash involved a police vehicle, an oversight Van Alstyne said he could not explain.

Colonie police released the more detailed accident report at 9 a.m. Monday, a routine timeline for the town's Traffic Safety Unit, which approves weekend reports when the work week begins.

"We're not trying to cover anything up," Van Alstyne said.

Troy police Chief John Tedesco declined to comment on the nature of the crash.

McKenna, 26, of Colonie, was driving his 2011 Chevrolet Silverado pickup when he crashed into a marked police van at the intersection of Goodrich Avenue and Route 7 in Colonie.

McKenna plowed into the van's rear driver side corner before side-swiping the van's door, Van Alstyne said.

The officer driving the van was standing next to the vehicle during the crash, Van Alstyne said. He was backing up a colleague during a routine traffic stop on Route 7, he said. Neither officer was injured.

The squad car and marked van were parked on the side of the road with their emergency lights on, the deputy chief said.

Colonie police supervisors assisted in the investigation, which ended in McKenna's arrest. The officer refused to take a breathalyzer test, police said.

Tedesco "relieved" McKenna of his duties pending an investigation into the incident, Troy police said. McKenna still is collecting pay, but the chief added he has not been suspended. He declined to say more.

"The protocol is we're doing an internal investigation and depending on what type of information is generated, that will decide our next course of action," Tedesco said Sunday.

McKenna will be arraigned in Colonie Town Court at 6:30 p.m. Monday.