ALISO VIEJO, Calif. (KABC) -- Several incidents in one general area have Orange County authorities trying to figure out if they have a serial attacker on the loose.
One of the four most recent attacks happened Tuesday morning.
A 28-year-old woman says a man grabbed her along the Aliso Creek Hiking Trail, but he ran off after she screamed.
"He grabbed her, tried to take control of her. She ended up having to fight her way away from him," said Sgt. Joses Walehwa of the Orange County Sheriff's Department. "She was able to headbutt him and escape as a result. "
An 11-year-old girl said the same thing happened to her last Wednesday as she was walking her dog along the same trail, when a suspect tried dragging her toward the bushes.
In an additional incident last week, a 16-year-old girl said she was walking home along the same trail when she was touched by an older man.
A 12-year-old girl reported a similar incident earlier this month near Windsong and Aliso Creek Road.
Sketches were released of the people or person responsible for the attacks.
Authorities are not sure if all four incidents are related.
"There are enough differences in all these cases that we're not entirely confident or sure that these cases are related," Walehwa said.
A task force was established last week, but investigators say they haven't been able to make an arrest.
Orange County authorities determining if more than one suspect responsible for series of attacks