Updated

The number of prisoners at Guantanamo Bay who are on a hunger strike has risen again.

Lt. Col. Samuel House said Friday that 97 men are now on strike, up three from the day before. He says 19 of them are receiving liquid nutrients through a nasal tube to prevent dangerous weight loss. Another five are under observation at the hospital on the U.S. base in Cuba.

He says none have life-threatening conditions.

The hunger strike began in February, with prisoners protesting conditions and their indefinite confinement. Lawyers for the prisoners say the military is undercounting the number of hunger strikers.

The U.S. holds 166 prisoners at Guantanamo, most without charges.