MANILA, Philippines?The National Bureau of Investigation has subpoenaed another friend of Dr. Hayden Kho to shed light on the spread on the Internet of the cosmetic surgeon?s sex videos with celebrities.

Dr. Bistek Rosario, a friend of Kho, was ordered to appear before the NBI on Wednesday, said Vicente De Guzman, head of the NBI Anti-Fraud and Computer Crimes Division.

Engineer Eric Johnston Chua was also summoned by the NBI, he said.

Both would be asked to explain about the uploading of Kho?s sex videos on the Internet.

De Guzman said Kho and his girlfriend, celebrity beauty expert Dr. Vicki Belo, were also expected to submit their separate statements on the complaint of actress Katrina Halili, whose steamy trysts with Kho can now be seen on pirated videos.