LOS OLIVOS, Calif. – Investigators armed with a search warrant are swarming Michael Jackson’s Neverland Ranch.

Court TV reported that a 12-year-old boy brought allegations against the pop star. At least one ambulance was present Tuesday on the Neverland grounds.

Jackson is not currently at Neverland , but is in the country, Jackson’s publicist Stuart Backerman said. Backerman was headed to the ranch and expected to have a statement later in the afternoon.

Authorities carried out the warrant at the 45-year-old singer’s sprawling home in the Santa Ynez Valley outside of Santa Barbara, said a sheriff’s spokesman, who declined to give his name. The Santa Barbara County district attorney’s office was also involved in the action, he added.

Jackson’s spokesman, Stuart Backerman, did not answer his cell phone and did not immediately return messages Tuesday.

The singer who had international hits with the albums “Thriller” (1982), “Bad” (1987) and “Dangerous” (1991), saw his career begin to collapse in 1993 amid allegations he molested a boy. Jackson has maintained his innocence, and charges were never filed. He reportedly paid a multimillion-dollar settlement.

Jackson is also connected to Hollywood private eye Anthony Pellicano, who began serving federal prison time Monday for possessing illegal explosives. Pellicano is being investigated about whether he secretly taped conversations of celebrities and their lawyers.

Pellicano, 59, worked for Jackson as a spokesman and security consultant during the abuse investigation.

The search came on the same day Epic Records released “Number Ones,” a greatest hits collection featuring Jackson’s new single, “One More Chance.” On Nov. 26, CBS is scheduled to air a Jackson special consisting mainly of old concert footage.