Updated at 4:50 p.m. with the name of the injured officer.
A cyclist was killed and an off-duty Arlington officer was injured during a crash Friday morning, officials said.
Fort Worth police said four cyclists were on the bridge of Dottie Lynn Parkway over West Division Street when a driver struck them from behind.
The cyclist who died has been identified by the Tarrant County Medical Examiner's Office as 57-year-old Steven Cannon of Arlington.
The off-duty officer who was cycling with the group was identified as detective Alan Branch. He was transported to a local hospital.
Friday afternoon, Arlington Police Deputy Chief Jeff Petty said detective Branch was in surgery with an unknown prognosis.
Petty said Branch is an 11-year veteran of the department currently working as a detective in the crimes against children unit.
"I've known him for several years," Petty told WFAA. "We’re just deeply saddened that he is having to go through this, and also that he lost a dear friend in the accident as well.”
Authorities said the other two cyclists had minor scrapes and bruises from the incident.
The crash is under investigation at this time. Officials said alcohol is not believed to be a factor and the driver of the vehicle remained on scene.