Lawyers for prisoners held at Guantanamo Bay say they are growing increasingly alarmed about the men's health as a hunger strike expands at the U.S. prison in Cuba.

Attorney Carlos Warner met with a prisoner from Kuwait this week and says the man appears to have lost 25 pounds. He said 35-year-old Faez al-Kandari was pale and could barely stand. Several other attorneys have reported similar accounts after meeting or speaking with prisoners in recent days.

A prison spokesman says military doctors are closely monitoring the men's weight and health. Navy Capt. Robert Durand also says the strike has grown to 26 prisoners, up by five since Monday.

Lawyers for the prisoners say many more are on strike in a protest over conditions at the prison and their indefinite detention.