Lisa Oswald, who has a 6th grader at the school, said she learned of the incident when the elementary school started sending students home.
Meanwhile police are investigating how the gun got into the school and whether the shooting was an accident or an intentional incident.
The seventh grader was rushed to hospital, but his condition was not immediately known, CBS News reported.
Parents were reunited with their children outside of schools a short time later.
Doug Martin released by Tampa Bay Buccaneers
Late in the 2016 season Martin was suspended four games after testing positive for Adderall and entered rehab. Martin then bounced back in 2015, with an All-Pro and Pro Bowl season in which he rushed for 1,402 yards.
Auburn loses McLemore to injury, game to SC
McLemore entered Saturday's game averaging 7.7 points and an SEC-high 2.7 blocks per game. Murray leads in rebounds with 7.0 while Harper tops in assists with 6.0 per game.
George Groves records unanimous points victory over Chris Eubank Jr
The new IBO and WBA (Super) champion earned a unanimous points victory over Eubank Jr in a gruelling war at the Manchester Arena. Eubank landed the bigger shots in the ninth, including a straight right that landed flush with Groves penned against the ropes.
'Students will be released to their parents in the near future'. A school official told reporters the town's four elementary schools were closed and the town's high school was being evacuated. "I just pulled in waiting to hear further information", said Larkins.
Officials are working on dismissing the students.
Cruz was armed with an AR-15-style rifle and had multiple magazines of ammunition when he surrendered to officers in a nearby residential area, police said.