A white male in his 30s who was known to police killed four people and wounded 21 others on Saturday in a gun rampage between the West
Texas cities of Midland and Odessa that started with a traffic stop and ended when he was killed by officers, authorities said.
The suspect hijacked a postal van and opened fire on police officers, motorists and shoppers on a busy Labor Day holiday weekend before being shot dead outside a multiplex cinema complex in Odessa, police said.
Authorities originally thought there were two shooters driving two vehicles, but Odessa Police Chief Michael Gerke told a news conference on Saturday evening that he believed there was only one.
The gunman was heading from Midland to Odessa on Interstate 20 when he was stopped at 3:17 p.m. local time, Gerke said. He shot the police officer, took off west on I-20 and then exited at Odessa. There he drove to a Home Depot and opened fire on passersby.
"At some point the suspect stole a mail truck and ditched his car," Gerke said. He drove the mail truck back east, pursued by police, before crashing into a stationary vehicle behind the Odessa Cinergy multiplex complex, where he engaged in a gun battle with police and was shot dead, Gerke said.
Video shown by a local CBS affiliate showed the white postal van crashing into a vehicle at high speed outside the movie theater complex before the man believed to be the shooter was swarmed by police.
Screaming theater goers ran from the complex.
Gerke said the suspect was known to him but declined to comment on a motive for the shootings.
The Medical Center Hospital in Odessa took in 13 victims, including one who died, the hospital's director, Russell Tippin, told reporters. Seven were in critical condition, two serious, and two were treated and released.
One "pediatric patient" under the age of 2 was transferred to another facility, he said.
"Grab onto your loved ones, pray for this town, stop and give your prayers for the victims," Tippin said.
Midland Mayor Jerry Morales said hundreds of people were enjoying the holiday weekend inside the Cinergy complex when the gunman was confronted by officers who boxed in his vehicle in the parking lot before shots were exchanged.
He said the suspect used a rifle to shoot the Texas Department of Public Safety officer who had stopped his vehicle, but did not know any more details about the weapon.
Morales said three police officers - one from Midland, one from Odessa and the Department of Public Safety officer - were wounded by gunfire. At one point, Midland police barricaded the highway to stop the suspect leaving Odessa, about 20 miles (32 km) away in the Permian oil boom area of West Texas.
"It was very chaotic," Morales said by telephone. "There were rumors flying that the shooter was at shopping malls, the movie theater."
Retail stores, a shopping mall and the University of Texas Permian Basin were locked down as rumors spread of the shootings and sightings, he said.
The Texas Department of Public Safety said that as two state troopers made the initial traffic stop on I-20, the suspect pointed a rifle toward the rear window of his car and fired several shots toward their patrol vehicle, hitting of them.
The wounded trooper is in serious but stable condition, and two other wounded police officers are in stable condition at a local hospital, the department said in a statement.
At one point armed police ran through the Music City Mall in Odessa, forcing anchors for television station CBS 7, located inside, to duck off-screen as the building went into lockdown.
Saturday's shooting came after 22 people were killed at a Walmart store about 255 miles west of Midland in the city of El Paso, Texas on August 3.
Vice President Mike Pence said following the shooting that President Donald Trump and his administration "remain absolutely determined" to work with leaders in both parties in Congress to take such steps "so we can address and confront this scourge of mass atrocities in our country."
Pence said Trump had spoken to the attorney general and that the FBI was assisting local law enforcement.
Trump has offered contradictory messages in reacting to recent mass shootings. Days after the El Paso shooting he said he was eager to implement "very meaningful background checks" on guns and told reporters there was "tremendous support" for action. He later backed away, saying the current system of background checks was "very, very strong."
Most recently, Trump has called for greater attention to mental health, saying that new facilities are needed for the mentally ill as a way to reduce mass shootings. However, some mental health professionals say such thinking is outdated, that linking mental illness to violence is wrong, and that the impact of more treatment would be helpful overall but would have a minor impact on gun violence.
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