LOS ANGELES (CNS) - Southland law enforcement agencies are on the lookout for a man suspected of abducting his 1-month-old son from Northern California who was believed to have been in San Diego overnight and may be headed this way, authorities said.

The suspect's cellphone was ``pinged'' on Interstate 805 between Balboa Avenue and state Route 163 at 11:55 p.m. Tuesday, according to California Highway Patrol Officer Robert Catano.

Mesut Guler, 22, allegedly took infant Henry Guler-Romero from Sunnyvale around 4:15 p.m. Tuesday, prompting a statewide Amber Alert.

Authorities in greater Los Angeles were watching to see if Guler passes through the region's road system.

The suspect was described as Turkish, 6 feet tall and 120 pounds, with brown hair and brown eyes.

Authorities said he may be driving a tan 2004 G-M-C Envoy with a large American eagle on the rear window and a license plate of 6HIL892.

Motorists who see the vehicle were asked to call 911 immediately.