At least eight people have died as a result of a shooting Friday morning at a high school in the southeastern Texas city of Santa Fe, CNN affiliates are reporting. This is the third school shooting in eight days, and the 22nd since the beginning of the year in the United States.

There has been, on average, 1 school shooting every week this year

A suspect has been arrested in Friday’s shooting at Santa Fe High School, about 20 miles outside Galveston, assistant principal Cris Richardson told reporters near the school.
A second person has been detained as well, Harris County Sheriff Ed Gonzalez said on Twitter.
Witnesses described students running from the school as they heard gunshots; they also described hearing an alarm at the school, though the sequence of events wasn’t immediately clear.

An armed person walked into an art class at the school and began firing what looked like a shotgun, a witness told CNN affiliate KTRK.