[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/07/29/art.conrad.murray.house.cnn.jpg caption="Investigators arrive at the Las Vegas, Nevada, home of Michael Jackson's personal physician."]
LAS VEGAS, Nevada (CNN) - Investigators searched the Las Vegas home and office of Michael Jackson's personal physician, Dr. Conrad Murray, on Tuesday morning, a Drug Enforcement Administration spokesman said.
Los Angeles police and DEA agents, carrying search warrants, were "looking for a lot of things," said Assistant Special Agent in Charge Mike Flanagan.
Aerial cameras showed investigators leaving Murray's home, three hours after they entered, carrying several containers.
The searches came a day after a source with knowledge of the investigation confirmed to CNN that Murray administered a powerful drug that authorities believe killed the singer.
Flanagan said that while he could not disclose details of the search warrants, because a judge had ordered them sealed, he confirmed they were looking for documents and computer records.
Murray's attorney, Ed Chernoff, issued a statement saying that officers from the DEA, Los Angeles police and "various local agencies" executed a search warrant at Murray's home and office beginning about 8 a.m. (11 a.m. ET) Tuesday.
"The search warrant authorized investigators to look for medical records relating to Michael Jackson and all of his reported aliases," the statement said. "Dr. Murray was present during the search of his home and assisted the officers."
Investigators left Murray's home about noon, he said, taking cell phones and a computer hard drive. "As of 2 p.m., the search at Dr. Murray's office continues," the statement said.