At least five people were killed and 21 others injured when a shooter opened fire in west Texas.
The shootings happened in the twin cities of Midland and Odessa on Saturday afternoon.
At around 3:17pm, an officer was shot when he attempted to stop a gold Honda vehicle on a highway between the two cities.
The driver - described as a white male in his 30s - fled the scene and is reported to have shot a number of people at random in Odessa.
He then abandoned the car and hijacked a postal truck, and continued firing at civilians.
The suspected gunman was ultimately shot and killed by police at a multiplex cinema complex in Odessa.
Three police officers are said to be among those shot, with a 17-month-old boy reported to be among those injured.
Chief of the Odessa Police Department, Michael Gerke, told reporters: "We have at least 21 shooting victims, and at least five deceased at this point in time.
"Once this [suspect] was taken out of the picture, there have been no more victims.
"I can't tell you of a motive at this point."
He added that the scenes at local hospitals was "chaotic" following the shootings.
There has been earlier warnings from police that there were two active shooters, but Mr Gerke later noted that police initially weren't aware it was the same person in both vehicles.
US President Donald Trump said he had been briefed about the shootings, noting that law enforcement was "fully engaged".
It's the latest mass shooting in the US, and comes less than a month after a gunman shot and killed 22 people at a Walmart store in El Paso, Texas.
Beto O'Rourke, the Texas politician seeking the Democratic nomination for the 2020 presidential election, said people's hearts are with "Midland, Odessa, and everyone in West Texas who has to endure this again".
He added: "More information is forthcoming, but here's what we know: We need to end this epidemic."