Update -- Austin police have arrested 29-year-old David Sanchez as a suspect in the attempted sexual assault at Hart Elementary School in northeast Austin.

An anonymous tip helped them identify Sanchez, who then “implicated himself in the incident,” according to detectives.

Right now, Sanchez is charged with robbery, a second-degree felony. Criminal elements of the attack remain under investigation.

Earlier -- Austin police are searching for a man who attacked a woman in northeast Austin.

Police say the suspect grabbed the woman as she was walking on the sidewalk near Hart Elementary School.

The man pulled her into the playground and tried to sexually assault her. Another woman in the area heard screaming, called 911 and the attacker ran away. The victim said she's seen the man in the area before.

Police say the man is Hispanic and in his 30s. He's about 5-feet, 6-inches tall and weighs about 175 pounds. Police say he has overlapping teeth and black tattoos on his chest which appear to form a square shape. He also has tattoos on his upper arms.

Police say the attacker was last seen wearing a white T-shirt, brown plaid shorts and tennis shoes.

If you've seen him, you’re urged to call APD's sex crimes unit at (512) 974-5230.