"CSI," said Dave Joyce. "There it is. Real crime scene investigators in Las Vegas."
A convention-goer, Jeff Martin, 33, of Columbus, Ohio, said he was unable to cross the Strip several hours after the attack.
"When you're out at 4 a.m. nothing good's going to happen," he said.
Sheahan said the attack was not a rolling gun battle as previously described. The SUV and Maserati were stopped or approaching a red light when at least one person in the Range Rover opened fire. Several people were inside the SUV, the sergeant said.
Six vehicles were involved in the crash that followed, including the taxi and Maserati. The taxi was affiliated with Desert Cab company, according to general manager Sandy Shaver. He declined to comment further.
The taxi might have been propane-powered, Sheahan said.
The incident marked the latest violence on the Strip since the beginning of the year. Two people were critically wounded in a shooting at a parking garage Feb. 6, and a tourist was stabbed Saturday in an elevator at The Hotel at Mandalay Bay.
A spokesman for the Las Vegas Convention and Visitors Authority, Jeremy Handel, reassured people that much is being done to keep them safe.
"Recent incidents, while unfortunate, were isolated events," he said in a statement. "Las Vegas is among the safest travel destinations in the world and utilizes the most advanced technology and training to maintain a secure environment."
Las Vegas Police Officer Jose Hernandez acknowledged that the Strip has seen several violent incidents in recent weeks but said police have made arrests or identified suspects in each case.
"People don't have to worry," he said. "This is an unusual occurrence, as tragic as it may be."
The intersection where the shooting occurred Thursday has been the site of high-profile violence in the past.
Rapper Tupac Shakur was killed in a drive-by in 1996 about a block away under similar circumstances, as assailants opened fire on his luxury sedan from a vehicle on Flamingo Road. The killing has never been solved.
Associated Press writers Michelle Rindels and Hannah Dreier contributed to this report.