AUSTIN, Texas (Reuters) - A gunman on Wednesday shot and killed a woman on a college campus in the Dallas area, before committing suicide, police said, two days after a deadly stabbing at another college in Texas.

Adrian Victor Torres, 21, shot and killed Janeera Nickol Gonzalez, 20, in a common study area at North Lake College in Irving, before taking his own life in a locker room shower in a nearby building, the Irving Police Department said.

“It is unclear at this time if there was a prior connection between the victim and suspect,” it said in a statement.

Local news showed video footage of students running out of school buildings, located about 10 miles (16 km) west of downtown Dallas, at about 11:30 a.m., as police swarmed the campus.

Gonzalez’s mother Lucia told an ABC affiliate that Torres “had been stalking her for quite a while but she didn’t make anything of it.”

The family told the WFAA that the two never dated and were not friends. Gonzalez was studying kinesiology and planned to graduate in a few weeks.

“There is no justice for my daughter,” Gonzalez said.

College officials announced the school would be closed for the rest of the week.

On Monday, a man enrolled at the University of Texas went on a stabbing spree with a large hunting knife at the school’s Austin campus about 200 miles (320 km) south of Irving, killing one student and wounding three, police said.