HOUSTON (AP) _ The father of a Houston-area teenager was arrested Monday for stabbing a male student who allegedly witnessed a sexual assault involving the man's daughter.

The man and his wife had gone to Wunsche High School in the Spring school district north of Houston to tell administrators about the assault, which they said took place off campus over the weekend. Their daughter is a student at the school.

The parents were in a security lobby area outside of the doors of the main campus when the father, identified as Ruben Carlos Cuellar, saw a male student who was allegedly present during the assault, said school district spokeswoman Karen Garrison.

Cuellar is accused of stabbing the unidentified student three times with a knife at around 8:30 a.m., about an hour after classes had started. The student had apparently arrived late to school, Garrison said.

"A campus police officer was nearby when the incident occurred and very quickly intervened and arrested the man," Garrison said. "Everything happened in the lobby outside of the doors to the main campus. Other students were not in danger or anywhere near that."

The stabbing victim was taken to a hospital in the Houston suburb of The Woodlands, where he was listed in good condition.

Cuellar was arrested by Spring ISD police and charged with aggravated assault with a deadly weapon. There were no records Monday afternoon to indicate whether he had an attorney.

The girl's parents had reported the sexual assault to Harris County Constable Precinct 4 over the weekend.

Garrison said the Harris County Sheriff's Department is still investigating the alleged sexual assault.

Copyright 2008 The Associated Press.