Abdullah Khadr, facing extradition to the U.S. over allegations of plotting to kill Americans and buying weapons for al Qaeda, will return to a Toronto court on Thursday for a bail hearing.

Khadr, 24, appeared in court briefly today as his mother, grandmother and younger brother looked on.

Khadr is the oldest son of a Canadian family long linked to the terrorist group. He appeared in court earlier this week after being arrested Saturday night in Toronto by the RCMP at the request of the U.S.

The arrest came two weeks after he was released from a Pakistani prison and returned to Toronto.

Massachusetts is seeking Khadr's extradition on charges of possession of a destructive device and conspiracy to murder Americans.

He faces a maximum life sentence if convicted.

Court affidavits say Khadr has admitted to his involvement in a plot to kill Americans and the Pakistani prime minister.

While in a Pakistani prison, Khadr also allegedly confessed that he bought weapons and parts for explosives for al Qaeda to use against U.S. forces in Afghanistan.

Khadr, who hasn't had a chance to respond to the unproven allegations, has been in custody since he was arrested.

The U.S. Justice Department alleges that Khadr had secured $20,000 US worth of rocket-propelled grenades, ammunition for AK-47s, mortar rounds and Russian machine guns for al Qaeda forces fighting in Afghanistan back in 2003. American authorities claim that he confessed to the buy while being held in a Pakistani jail.