HOMESTEAD, Fla. -- A 13-year-old Florida girl is dead after another student opened fire inside her school bus.

Police said a male fired a gun inside the bus around 7 a.m. Tuesday morning hitting the teenager.

The victim was airlifted to a nearby hospital were she died from her injuries.

The suspected shooter is in custody. And the police are still working on a motive.

"They were able to immediately determine that the shooting occurred inside the bus and that the alleged shooter was also inside the bus," said Detective Alvaro Zabaleta. "He was immediately taken into custody."

Police said there were several other children inside the bus including the victim's seven-year-old sister.

No one else was hurt.