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Canadian Omar Khadr is accused of killing a U.S. soldier with a grenade during a battle in Afghanistan in 2002. ((Janet Hamlin/Pool/CBC))

Omar Khadr's high-profile Pentagon-appointed lawyer was officially dismissed from the legal defence team at a hearing in Guantanamo Bay, Cuba, on Wednesday.

The move came in the wake of Lt.-Cmdr. Bill Kuebler's turbulent relationship with his colleagues on Khadr's defence team.

Khadr's Canadian lawyer, Dennis Edney, said Kuebler put his self-interest ahead of his client. The appointment of two new civilian lawyers will strengthen the defence team, Edney said.

Toronto-born Khadr, now 22, is accused by the United States of killing a U.S. soldier with a hand grenade in Afghanistan in 2002, when he was 15. He has been held at Guantanamo Bay since then.

The case against Khadr at the U.S. military tribunal in Guantanamo is adjourned until Nov. 16 while U.S. President Barack Obama decides how to proceed with Khadr and 200 other prisoners there.

Pentagon prosecutors have suffered several setbacks in the case, including the revelation that nobody actually saw Khadr throw a grenade and the leak of a document last year revealing that another militant could have done it.