An Amber Alert (search) was issued Wednesday for an 11-year-old boy who was likely abducted in Marion County and may be in danger, authorities said.

The Florida Department of Law Enforcement (search) and sheriff's deputies searched Wednesday for the boy, who was last seen Tuesday afternoon in Dunnellon, about 75 miles northwest of Orlando.

He may be with a man identified as Frederick Fretz, 42, and they may be traveling in a white four-door Chevy Lumina, Marion County's sheriff's office said.

Fretz had picked up the boy at Dunnellon Elementary School on Tuesday, the sheriff's office said.

Fretz, a known sex offender in Arizona and Pennsylvania, has been roommates with the boy's father, Ivert Kirkirt, who met Fretz in jail in September or October, the sheriff's office said. Fretz would often take the boy to and from school, officials said.

The missing boy, who moved into his father's Ocala apartment in December, is about 5 feet tall and weighs about 100 pounds. He was last seen wearing black pants, a white T-shirt and a black sweat shirt with a Spider-Man symbol.

No further information was made available Wednesday.

Amber Alerts rapidly notify the public and other law enforcement agencies of a missing child who may be in danger.