Indonesia has urged the US to provide access to an Indonesian militant now being held at its Guantanamo Bay camp.
The US has held Hambali in a secret location since 2003
Hambali, the alleged operations chief of South East Asian militant group Jemaah Islamiah, was arrested in Thailand in 2003 and handed to the US.
Since then, Jakarta has had no access to him or news of his whereabouts.
He is one of 14 key terror suspects President Bush confirmed the US was holding when he admitted the existence of secret CIA prisons on Wednesday.
Mr Bush said that the suspects had now been transferred to the detention camp in Cuba and no terror suspects remained in the CIA prisons.
Indonesian authorities say they want to speak to Hambali.
"Indonesia has repeatedly asked for the whereabouts of Hambali," said foreign affairs spokesman Desra Percaya.
"This announcement has given us clarity. We welcome the certainty of his existence."
On Thursday, officials in the US announced plans to resume military tribunals for Guantanamo detainees, including the 14 suspects.
"Now it is clear where he is, we're going to request consular access to ensure a fair trial," Mr Percaya said.
Hambali has been named as a key suspect in a string of bombings across the region.
According to the US, he was the main liaison between Jemaah Islamiah and al-Qaeda from 2000 until his capture in 2003.
Intelligence officials accuse him of planning the first Bali bombing in 2002, in which 202 people died, and raising funds from al-Qaeda for the 2003 attack on the Marriott hotel in Jakarta, which killed 12.
The US was said to have paid $10m to the Thai government for its role in arresting him.