A parolee was arrested after allegedly attacking a 63-year-old woman in Burbank and leaving her critically injured, police said Tuesday.
Burbank police officers responded to a report of a possible fight about 1:50 p.m. Monday in the 1400 block of North San Fernando Boulevard.
The officers found the victim in an alley suffering from head trauma, police said in a news release.
Several bystanders said they saw a man running from the area, and the officers found the suspect near Amherst Drive and Broadway Avenue. He was identified as Hector Manuel Ulloa, 51, and described as a transient from San Bernardino.
Witnesses told police they heard screams for help and saw the suspect kicking and punching the victim numerous times. Authorities believe Ulloa targeted the victim and hid until she walked by.
"The man jumped out and punched her in the face. He took her down and kept on punching her and kicking her," said Henry Kwan, who works in the area and witnessed the attack.
Kwan said it appeared the woman was struck some 20 times before some of his co-workers came outside and asked the man to stop. The woman, who has not been identified, appeared bloodied as the man walked away.
She was taken to a trauma center and is in critical condition, police said.
The motive remains under investigation, but authorities believe the attack was random and that the two did not know each other. Kwan said the woman appeared to be just walking and talking on her cell phone when she was suddenly assaulted.
Ulloa, who was on parole when the attack occurred, was booked on suspicion of attempted murder and is being held without bail.
KTLA's Marissa Wenzke contributed to this report.