Apologies for Wikileaks are not enough, a top Democratic Party leader says, after an Australian newspaper, citing a leaked cable, alleged that President Susilo Bambang Yudhoyono abused his power.

"The US government must evaluate how its diplomats work. Their information must be accurate – and not based on gossip," Democratic Party chairman Anas Urbaningrum said as quoted by tribunnews.com on Sunday.

"Gossip and sensational news that had no factual basis were incorporated into diplomatic cables. This gossip should have been verified," he added.

Leading Australian newspaper alleged that Yudhoyono abused his authority when he instructed then attorney general Hendarman Supandji to drop a corruption investigation centered on Taufik Kiemas, husband of former president and Indonesian Democratic Party of Struggle chairwoman Megawati Soekarnoputri.