LAVEEN, Ariz. -- A high school in Laveen was placed on lockdown for a short time Wednesday morning after a fight broke out on campus.Two girls got in a fight in the cafeteria at Betty H. Fairfax High School at approximately 7:30 a.m., according to Phoenix police Sgt. Tommy Thompson.Thompson said other students ran to see the fight. A male student jumped in to help one of the girls and reportedly pushed a security guard. Police officers responded to the school near 59th Avenue and Baseline Road and the campus was locked down for approximately 10 minutes.Thompson said the fight stemmed from an off-campus altercation Tuesday between several girls and two mothers at a bus stop.One of the mothers involved in Tuesday's incident heard about the fight at the school and went to the campus.Thompson said the woman bypassed school security guards and failed to obey their commands. She was taken into custody along with the student who allegedly pushed the guard.The woman, Kendra Jackson, 31, was charged with one count of disruption of an educational institution. The 16-year-old boy was charged with aggravated assault. The students involved in the fight will be dealt with by administrators.