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The latest mass shooting in America has left seven people dead. Two dozen more were wounded in the rampage outside Odessa, Texas — the second mass shooting in the state in a month. The alleged gunman was killed by police, bringing the total death toll from the incident to eight, ranging in age from 15 to 57, CBS News reports.

The terrifying chain of events began with a traffic stop Saturday on an interstate in the heart of Texas' oil country. State troopers say the man, a white male, pulled over for the traffic stop but then opened fire and took off.

Gunshots hit one trooper in the car that made the traffic stop. The gunman then ditched his car and hijacked a postal service truck, unleashing more rounds as he drove away. Authorities later said the postal worker, 29-year-old Mary Granados, was killed.

Her teary-eyed identical twin sister, Rosie, told CBS News correspondent David Begnaud, "He could have  taken the car without having to kill her. ... He didn't have to take my sister."

The gunman was eventually killed in a shootout with police outside a movie theater, but two more officers were among those left wounded. All three officers shot were said to be in stable condition as of Saturday night.

The suspect died in a hospital in Midland and has been identified as Seth Ator, 36, according to his criminal record obtained by CBS News.

At least 10 victims remained in critical condition at two local hospitals.

Odessa police said in a statement that the suspect fired "at innocent civilians all over" the city. The youngest victim confirmed as of Sunday was a 17-month-old girl who was struck by shrapnel.

Officials said during a news conference Sunday afternoon that they did not believe there was any connection to foreign or domestic terrorism in the shooting. They said it appeared he acted alone.

The shooting came just a month after a gunman in El Paso killed 22 people when he opened fire in a Walmart store. Saturday's attack was the 38th mass shooting in the U.S. this year.