SYDNEY (AFP)--An Australian man was missing feared dead in the Jakarta luxury hotel blasts, his family said Friday, as Prime Minister Kevin Rudd confirmed at least two other nationals had been injured.

Craig Senger, a senior official with the Australian government's trade agency Austrade, was at the JW Marriott hotel when it was rocked by a high-powered explosion, media here reported.

"We fear the worst," Senger's uncle Geoff Lazurus told The Age newspaper.

Senger had been attending a conference at the hotel and Australian Embassy officials had seen television footage of him lying on an ambulance stretcher, according to The Daily Telegraph online.

Rudd condemned the attacks, which left nine dead and more than 40 wounded, saying they made him "sick to the stomach."

"Any attack anywhere is an attack on us all," Rudd told reporters. "Any terrorist attack on our friends Indonesia is an attack on our neighbors.

"Any terrorist attack is an act of cowardice. It is an act of murder. It is a barbaric act that violates the fundamental principles of human decency."

Rudd said embassy staff in the Indonesian capital had received reports that at least two Australians had been wounded.

Consular staff were urgently seeking to locate the injured Australians to confirm their welfare, and were also seeking to establish whether any other Australians had been injured, a foreign affairs spokeswoman said.

"The government has never lost sight of the threat from terrorism in the region," she added.

A man who identified himself as Jim earlier told commercial radio his son had phoned him from the Indonesian capital to say his leg was wounded and he had lost hearing in one ear in the explosion at the JW Marriott hotel.

His son was on his way to hospital, but apart from his leg injury, was otherwise okay, he said.

"He was in the explosion and he was bleeding from the left leg, although from what I can gather the injury is not serious," he told the Fairfax radio network.

"He lost his hearing in one ear, but he thinks he will recover from that, and he's on his way to hospital. He's okay," he added.

The Telegraph report said a senior staff member from ANZ Banking Group had also been hurt in the Marriott blast.

"Hes suffered cuts and other non-threatening injuries and is (recovering) in Jakarta Hospital," it quoted a bank spokesperson as saying.

It wasn't clear whether they were the two injured known to Australian authorities.

The explosions rocked the upmarket area around 8 a.m. (0100 GMT) near the site of a 2003 bombing by Islamist militants of the Marriott, which killed 12 people.