RNA - "I was informed yesterday evening by the [Zionist] hospital where he is being held that he had fallen into a coma," Jamil al-Khatib, the attorney of detainee Mohammed Allan, said.
There was no immediate confirmation from the Zionist authorities.
A spokeswoman for the Palestinian Prisoners Club said Allan was on life support.
"Mohammed Allan fell into a coma and was then placed on an artificial respirator," Amani Sarahneh said.
Allan has been on hunger strike since June 18, the prisoners club said.
His case is a source of growing concern among the Palestinian public.
Allan's lawyer said that Israel intends to force-feed him, a measure likely to further increase Palestinian anger.
The authorities may also find it hard to find a doctor willing to cooperate, as the 'Israeli Medical Association' strongly opposes the practice.
"A doctor will not participate in force-feeing a hunger striker," it says in a position paper published on its website.
A Zionist official speaking on condition of anonymity said that force-feeding was very much a last resort and required approval by a judge in every case.
"Before forced feeding there are many, many medical processes," he said. "They can give him water and other fluids intravenously. There's no need to go straight to forced feeding."
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