The US Department of Justice (DOJ) has embarrassed itself by relying on unreliable sources in its investigation into the 1MDB affair, Umno supreme council member Ab Aziz Kaprawi said today.

Aziz said the DOJ did not refer the matter to Malaysian authorities, which have investigated 1MDB extensively, nor did it try to seek the help of company president Arul Kanda Kandasamy.

"If the DOJ wishes to investigate... its investigation must be thorough and not rely on reports by unknown individuals who were guided by illegitimate websites, such as Sarawak Report, which sides with the opposition," Aziz said.

He said this in a statement disseminated through the WhatsApp messaging application, using an account operated by the Special Affairs Department (Jasa)...