Darien Police arrested Angel R. Vega, 36, of 19 Manor Street in Stamford, following a motor-vehicle accident involving Vega and a Darien Police officer on Post Road at 1:36 p.m. Tuesday.

"Darien officers were notified that Stamford police were in pursuit of a vehicle that had been involved in a road rage incident in Stamford. The vehicle in question is described as a yellow Nissan Xterra," Darien Capt. Fred Komm wrote in a statement on Tuesday.

The original incident took place on East Main Street near Waterbury Avenue in Stamford, just over the Darien line, Stamford Police Sgt. Charles White said.

"It involved some type of another motorist "' and we believe it goes a little deeper than that "' where [Vega] rammed that car in Stamford, in front of one of our police officers," White said.

Stamford Police pursued the SUV into Darien before calling of their pursuit due to safety concerns, White said.

"Darien officers subsequently observed the vehicle traveling eastbound on the Post Road in the area of Renshaw Road. At the time of the observation, Shift Commander Lieutenant Thomas Krois, operating a fully marked Ford Expedition police vehicle, was traveling westbound on the Post Road at a location on the Post Road between Renshaw Road and Hecker Avenue. As the two vehicles approached one another, a collision occurred resulting in an injury to Lieutenant Krois' right leg. He was transported to Stamford Hospital by Post 53 EMS," Komm wrote in a press release.

"We don't know the extent of [Krois's] injury, but he's conscious and stable, and it doesn't appear to be too severe," Darien Sgt. Jeremiah Johnson said.

Though Vega is in police custody, the charges have not yet been specified, police said.

The department sent out a Nixle notification at 1:51 p.m. Tuesday, which read: "Post Road closed. Detoured in both directions near Renshaw Road for a motor vehicle accident investigation. Please use alternate route."

Post Road was re-opened early Tuesday evening, according to police.