MIAMI BEACH, Fla. -- Police say the arrest of Denver Broncos defensive end Elvis Dumervil was preceded by a road-rage incident in which Dumervil and another man allegedly lifted their shirts and displayed firearms to people in another vehicle.

A police report released Monday says the 28-year-old Dumervil was driving his Range Rover and following a silver Mercedes, in which another man, Andy Aguste, was a passenger. While stuck in traffic Saturday evening, a white Chevy Impala, driven by Kristine Ramirez, merged between the two cars.

According to the police report, the parties got into a verbal argument that included horn-blowing and name-calling. At some point during the argument, the accusers in the Impala say, Aguste exited the Mercedes and approached them. Aguste allegedly verbally threatened the riders in the Impala and then lifted up his shirt to reveal a firearm in his waistband, police said.

The accusers also say in the report that Dumervil, a Miami native, walked up to the Impala and lifted his shirt to display a firearm, but never said anything.

After Dumervil and Aguste displayed the firearms, the driver of the Impala quickly accelerated in an attempt to get away, the report stated.

Police say that an employee from a nearby Victoria's Secret witnessed the incident and called police. The employee's statement corroborated much of the accusers' accounts of events, the report said, except the employee stated that one of the passengers in the Impala got out of the car during the initial verbal argument and yelled toward Dumervil's Range Rover, but never moved in its direction.

The Victoria's Secret employee also told police that Ramirez, the driver of the Impala, threw an unknown object at the Range Rover and struck it.