An Israeli military court on Sunday rejected the appeal of a Palestinian woman who has been on hunger strike for 39 days, her lawyer told AFP.
Hanaa Shalabi was appealing a four-month administrative detention order allowing her to be held without charge.
"The Israeli military court rejected the appeal and now we will go to the High Court," Jawad Bulus said. "Hanaa will continue her hunger strike."
Shalabi was detained on February 16, and a military court initially ordered her held for six months. That was later reduced to four months, the decision she unsuccessfully appealed.
Shalabi has been on hunger strike since her arrest, to protest, she says, both her detention without charge and violence inflicted during her arrest.
On Friday, rights group Amnesty International urged Israel to prosecute or free Shalabi, saying she was "at risk of death."
Shalabi was among more than 1,000 Palestinian prisoners released in October in a trade for Israeli soldier Gilad Shalit, held by Gaza Strip-based militants for more than five years.
She had been held by Israel for more than two years without charge before she was released under the prisoner exchange.
The Israeli army has said she is "a global jihad-affiliated operative" and was re-arrested on suspicion that she "posed a threat to the area." But no charges have been filed against her and no specific allegations have been made public.
Shalabi is one of around 300 Palestinian prisoners being held in Israeli jails under administrative detention orders, which allow a court to order an individual be detained for periods of up to six months at a time.
