A gunman and a police officer were among three people killed in a shooting near a Texas university campus, police said.
A male civilian was also killed, while two other officers and a woman were injured in the shooting near Texas A&M University at College Station, said Bryan police department spokesman Jon Agnew.
Assistant College Station police chief Scott McCollum earlier identified the officer killed as Brazos County constable Brian Bachmann.
Mr Agnew said officers had established a perimeter around the area shortly after the shooting just east of campus, but they do not believe a second suspect was involved. He said police do not know if the shooter was a student at Texas A&M.
The school had issued an alert on its website warning of an active shooter near the campus football stadium, Kyle Field. The alert warned residents and students to avoid the area, and was later updated with the shooter taken into custody.
Texas A&M spokeswoman Sherylon Carroll could not confirm details about the shooting, but said most students were not on campus. Their autumn does not begin until August 27. "It appeared to be fairly quiet," Ms Carroll said of campus. "It didn't appear to be a lot of people out and about at that particular time."
College Station is about 90 miles north-west of Houston. Texas A&M is home to more than 50,000 students, according to its website.
Police said the gunman was being served an eviction notice before he opened fire from inside a home near the university.
Mr McCollum said a 65-year-old man was the third person killed.
He said Mr Bachmann went to the off-campus home near the university's football stadium in the early afternoon when the gunman opened fire. Other officers rushed to the scene after receiving a call that an officer had been shot.