Sources: Jackson medicated while on tour

LOS ANGELES, July 3 (UPI) -- Michael Jackson routinely took medication supplied by an anesthesiologist while traveling on his HIStory tour, sources close to the late U.S. singer say.

CNN said Friday the unidentified sources identified the anesthesiologist who traveled with Jackson during his 82-date world tour in 1996-97 as Dr. Neil Ratner.

One of the anonymous sources said Ratner routinely used medical equipment to monitor Jackson as the "Beat It" star slept.

The sources' claims come after nutritionist Cherilyn Lee alleged this week that Jackson once pleaded with her to provide him with a sedative called Diprivan.

The medication claims also follow reports from two federal law enforcement sources that the U.S. Drug Enforcement Administration would be investigating the possible involvement of drugs in Jackson's death last Thursday.

The California attorney general's office and the Los Angeles Police Department already are involved in the inquiry.

CNN said, citing the Los Angeles County coroner, the results of toxicology tests on Jackson's body are not expected for as long as three weeks as authorities attempt to determine what killed the "Thriller" star.