MIDLAND, Texas — Five people were killed and 21 injured, including police officers, in an active shooting situation in West Texas Saturday, between the cities of Midland and Odessa, authorities said.

Midland police reported Saturday afternoon around 4:30 p.m. a shooter was shot and killed in Odessa.

Police in Midland said officers were looking for two shooters in two separate vehicles, a gold/white small Toyota truck and a US Postal Service van, but police later reported there was one shooter, who was later killed.

Devin Sanchez, a spokesman for the City of Odessa, said someone in a gold Toyota was driving around shopping centers and shooting people from his vehicle. The area is near 32nd and 191, on the east side of Odessa.

Midland Police Department put on their Facebook page, “We believe there are two shooters in two separate vehicles. One suspect is believed to be at the Cinergy in Midland and the other is believed to be driving on Loop 250 in Midland. The two vehicles in question are: gold/white small Toyota truck and a USPS Postal Van. Please stay away from these areas and stay indoors.”

The Odessa police Facebook page said the mail carrier truck was hijacked.

Sanchez says authorities are urging people to stay indoors.

According to a tweet, the University of Texas Permian Basin is on lockdown.

Attributable to the New York Police Department Counterterrorism Bureau via Twitter:

“We are closely monitoring the ongoing active shooter incident in Midland/Odessa, Texas”

Only four weeks ago, a gunman killed 22 people in a mass shooting in El Paso, located about 285 miles to the west of Odessa.