MIAMI -

A man is dead after an argument on a Miami-Dade County bus prompted a shooting, police said.

The incident happened about 9:30 p.m. Tuesday in the Busway near Southwest 200th Street and U.S. 1, Miami-Dade police said.

One of the people involved pulled out a gun and shot the other, Miami-Dade police said.

Rufus McKenzie said he was on his way home from work, sitting just in front of the shooter on the bus, when he heard the argument escalate, and then two gunshots.

"That's when people started screaming and jumping up and running," he said.

There were quite a few people onboard, and when the bus stopped, there was a rush to get off. Witnesses said they were lunging for every exit, and even the driver tried to get off as quickly as she could.

The victim, whom police identified as Lamar Callie, 24, of Miami, was airlifted to Kendall Regional Medical Center's Trauma Center and later died.

The shooter fled the scene.

Investigators have not said whether they believe Callie and the shooter knew each other. But, rider Phil Cournoiar said he sees a lot of arguments and anger on the bus.

"I am surprised it hasn't happened more often," Cournoiar said. "To me, there is a lot of violence and a lot of people with simmering feelings."

Callie had an extensive criminal record, including drug and weapons charges, but it is unclear what led to his shooting.

Meanwhile, McKenzie said he owes his quick escape to instinct.

"You move. You didn't just sit there. You didn't hesitate; you didn't panic. You moved. You got out of there," he said.

But, he said he owes his life to a higher power.

"I owe it to the good Lord above, not me or anybody else. I owe it to Him," he said.

The buses were running normally Wednesday.

Anyone with information is asked to call Miami-Dade Crime Stoppers at 305-471-TIPS (8477).