A 14-year-old boy and 13-year-old girl have been airlifted to a Lubbock, Texas, hospital after a school shooting in Roswell, N.M., reports KOB.com.

The boy is listed in critical condition, but the girl has been upgraded to serious condition.

New Mexico State Police officials said local authorities were dispatched to Berrendo Middle School at 8:11 a.m. Witnesses say the shooting took place in the gym before school started. Several witnesses said the shooter fired a gun into a crowd of students before a teacher tackled him.

According to the Roswell Police Department Facebook page, the shooter was apprehended. A source close to the investigation tells KOB a 13-year-old was taken into custody.