Psychiatrists Hugh Richards from Britain and D L Crisson from the US warned on Tuesday that if al-Hajj remained in the camp, his life could be in danger.
 
Clive Stafford-Smith, al Hajj's lawyer, told Al Jazeera: "I'm incredibly worried about him.

"Last time I saw him ... he was talking about death."

'Immediate treatment'

Al-Hajj, originally from Sudan, was arrested in Pakistan in December 2001 on the Afghanistan-Pakistan border by Pakistani intelligence and was handed to the US military in January 2002.

Prisoner 345

Find out more about the campaign to free Sami al-Hajj

The cameraman is one of about 20 prisoners in Guantanamo Bay who have carried out a hunger strike in protest at their imprisonment and treatment at the US detention centre in Cuba.

In July, al-Hajj had reportedly lost 18kg in weight since he began the hunger strike, according to notes from a meeting with his lawyer.

Stafford-Smith said the US military was behaving shamefully by force-feeding hunger strikers.

Al-Hajj has also complained that hunger strikers at Guantanamo were stripped of all their personal items except their clothes and had only a thin mat on which to sleep.

Release stalled

The two psychiatrists said in their letter that al-Hajj was in a constant state of fear and anxiety and felt that he was being pursued and could be killed.

The two said al-Hajj needed immediate treatment from specialised doctors to alleviate his condition.

The cameraman, who has been accused by the US of having links to al-Qaeda, could be released if Khartoum guarantees that he remains in Sudan.

However, negotiations over his release stalled in August and Stafford-Smith urged the authorities in Qatar, where Al Jazeera is based, to intervene on behalf of their employee.