UPDATED, 4:20 p.m.: The injured hiker reportedly suffered several punctures to the lung and fell 150 feet down the side of the ravine, according to Lisa Derderian of the Pasadena Fire Department. He was transported from Eaton Canyon in critical condition.
UPDATED, 12:42 p.m.: The injured hiker was flown to Huntington Memorial Hospital in serious condition, according to Lise Derderian of the Pasadena Fire Department. The hiker reportedly fell off the side of the canyon and into a ravine adjacent to Coyote Canyon.
"He required some pretty intensive medical intervention in the field before he was able to be transported," Derderian said.
The hiker reportedly suffered from a punctured lung, in addition to having low blood sugar. According to Derderian, the man was conscious enough after the fall to dial 911 with his cell phone. Rescue teams sounded whistles and dispatchers would listen to the open line and coordinate with teams to determine if authorities were closing in.
"They needed to secure his neck before they transported him," Derderian said. "His condition wasn't looking too good as of about an hour ago."
Coyote Canyon is an area accesible from the Eaton Canyon Nature Center and other trails in the area.
UPDATED, 12:11 p.m.: Rescuers have located the injured hiker, a 53-year-old male, and are preparing the patient for a hoist from Air Rescue 5. The man was located in the area of the bridge, north of the Eaton Canyon Nature Center according to scanner reports.
The injured hiker may have suffered a lung injury.
PREVIOUSLY: Los Angeles County Fire personnel from Pasadena and the Altadena Search and Rescue are traversing into Eaton Canyon to aid a reported injured hiker.
The Altadena Sheriff's Station received the call at 10:41 a.m., authorities said. A male hiker is reportedly having difficulty breathing and is passing in and out of consciousness.
The man is reportedly in Coyote Canyon along the ridge area, according to Sheriff's deputies.
Los Angeles County Sheriff's Air Rescue 5 is standing by at Henninger Flats to help with the search effort. According to scanner reports, the man may be suffering from diabetic issues near the first falls area.
This story will continue to be updated as information becomes available.