TEMPE, Ariz. -- Authorities say three people have been wounded after a drive-by shooting in Tempe that may be drug related.
Tempe police say McClintock High was put on precautionary lockdown around 1 p.m. Wednesday after shots were fired from a moving vehicle on a nearby street.
McClintock is being used for summer classes by the Tempe Union High School District.
Police say one person is in critical condition after being transported to a hospital.
They say two other people transported themselves to a hospital and were being treated for apparent non-life threatening injuries.
Police haven't released the names of the three people wounded and say they are still looking for suspects in the case.
A fourth person who was at the home during the shooting was taken into custody.
They say they're investigating the possibility that the drive-by shooting is drug related.
"It's very concerning. We have a high school right here. Summer school was in session," said Tempe police spokesman Lt. Michael Pooley. "We're trying to find out exactly what happened. We're not getting a lot of cooperation from the victims, so it makes it more difficult."
About two dozen kids were in the swimming pool outside when the shots were fired.
Students and teachers both heard the shots, and a school resource officer helped the students get inside safely.
"We were pretty scared," student Madeline Krueger said. "I was like, something could happen to us. Somebody could physically break into the building. Something could happen to us at any time."
@TempePoliceFire working a shooting in area of 1900 E. Cairo. One person hit... Avoid the area— Michael Pooley (@SgtMikePooley) June 11, 2014