'The unanswered questions have not been answered and that's why the investigation is expanding,' Mr Jackson told MSNBC on Saturday. 'It's kind of getting bigger and bigger.' The Los Angeles Times reported on its website Saturday that investigators were focusing on 'at least five doctors' who prescribed drugs to Jackson.
An unidentified source told the newspaper 'numerous bottles' of Diprivan - the brand name for propofol - were found at Jackson's home.
Exact details of Jackson's funeral service have not yet been released although officials on Friday announced plans for a public memorial on Tuesday at Los Angeles's Staples Center sports arena.
In a clear attempt to deter large numbers of ticketless fans from besieging the venue and creating a logistical nightmare, city officials said the entire area would be put on lockdown.
'If you do not have a ticket... not only will you not be allowed at these venues, you will not be allowed in this area,' Los Angeles Police Department chief Earl Paysinger said.
The warning came as officials revealed tickets for the event would be distributed via an Internet lottery, with fans registering at the Staples Center's website to enter a draw from Friday onwards.
Some 11,000 tickets are to be made available for the event inside the main venue while an additional 6,500 tickets would be distributed for fans watching the service on giant screens at the neighboring Nokia Theater. -- AFP