HOUSTON (AP) -

A law enforcement officer will need reconstructive surgery for facial and head injuries suffered when he interrupted a sexual assault at a Houston-area park and the attacker turned on him.

Fort Bend County sheriff's officials said Wednesday that Conrad Wilturner, a Houston park ranger, was conducting a property check at the park when he discovered a woman being assaulted.

Authorities say the assailant, identified as 25-year-old Migueal Velasquez of Houston, was armed with a steel pipe early Monday morning when he attacked Wilturner. Velasquez allegedly fled the park but was later found by police.

Charges against Velasquez include sexual assault and aggravated assault of a public servant. He's being held at the Fort Bend County jail on a $750,000 bond.

Online jail records did not indicate an attorney for Velasquez.