Lebanon has asked Brazil to extradite a former top executive at a bank that could be linked to the killing of Rafiq al-Hariri, the former Lebanese prime minister. Rana Koleilat is wanted in Lebanon on fraud, embezzlement and forgery charges related to the collapse of Bank al-Madina in 2003 and was arrested in Brazil on Sunday.In a Sao Paulo jail on Wednesday, the fugitive banker cut her left wrist with a blade from a contraband eyeliner sharpener, but police denied she tried to commit suicide, saying it was only an attempt to draw attention to her plight. UN investigators have told police they want to question Koleilat in connection with the February 2005 assassination.