WASHINGTON -- Nearly half the detainees at the Guantanamo Bay prison camp have been formally classified as hunger strikers a week after guards raided the facility's largest communal area and forced detainees into single cells.

As of Saturday, 77 of the 166 prisoners being held at the United States naval base are recognized as engaging in a hunger strike, according to Lt. Col. Sam House. Seventeen of them have a tube inserted through their nose and a can of Ensure, a nutrition drink, is being pumped into their stomachs; five are in the hospital with non-life threatening conditions.

On April 13, guards forced detainees from communal areas in the Camp 6 prison facility to individual cells, according to a news release from the Department of Defense. The action was taken "in response to efforts by detainees to limit the guard force's ability to observe the detainees by covering surveillance cameras, windows, and glass partitions," it stated.

The number of detainees on a hunger strike has grown quickly over the past few days as medical personnel check the weight and health of detainees who they were unable to evaluate when the cameras were covered.

The military's Muslim adviser in Guantanamo told reporters this week that one or more of the detainees will die before the hunger strike is over. Reporters listening to morning prayers were evacuated from the higher security Camp 5 after a detainee began feeling faint and had to be evaluated by medical personnel.

Also on HuffPost:

Loading Slideshow...
  • Photo reviewed by U.S. military officials shows the Guantanamo Bay Camp VI in Guantanamo, where 70 prisoners are detained, on Guantanamo October 23, 2010. (Getty)

  • Photo reviewed by U.S. military officials shows the Guantanamo Bay Camp VI in Guantanamo, where 70 prisoners are detained, on Guantanamo October 23, 2010. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows 'comfort items' given to the detainees: newspaper, games and one PS3 for the whole camp at Guantanamo Bay Camp VI in Guantanamo where 70 prisoners are detained on Guantanamo October 23, 2010. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows a silence sign inside the Guantanamo Bay Camp VI in Guantanamo, where 70 prisoners are detained, on Guantanamo October 23, 2010. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows a class area in the Guantanamo Bay Camp VI in Guantanamo, where 70 prisoners are detained, on Guantanamo October 23, 2010. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows a cell in the Guantanamo Bay Camp VI in Guantanamo, where 70 prisoners are detained, on Guantanamo October 23, 2010. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows a senior medical officer demonstrating how the detainees who refuse to eat are fed with a feeding tube in the hospital of the Guantanamo Bay Camp VI in Guantanamo. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows Lieutenant Colonel Andrews McManus, deputy commander of the Joint detention group commander, inside the hospital for the detainees of the Camp VI in Guantanamo Bay. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows a recreation area in Camp VI in Guantanamo Bay. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows Camp VI in Guantanamo Bay. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows Camp VI entrance in Guantanamo. (Virginie Montet/AFP/Getty Images)

  • Photo reviewed by U.S. military officials shows Camp VI in Guantanamo Bay. (Virginie Montet/AFP/Getty Images)

  • <em>Image has been reviewed by the U.S. Military prior to transmission.</em> A U.S. military guard tower stands on the perimeter of a detainee camp at the U.S. detention center for 'enemy combatants' on September 16, 2010, in Guantanamo Bay, Cuba. With attempts by the Obama administration to close the facility stalled, some than 170 detainees remain at the detention center, which was opened by the Bush administration after the attacks of 9/11. The facility is run by Joint Task Force Guantanamo, located on the U.S. Naval Station at Guantanamo Bay on the southeastern coast of Cuba. (John Moore/Getty Images)

  • Photo reviewed by U.S. military officials shows Camp Justice, where the media is housed on Guantanamo, October 22, 2010. (Virginie Montet/AFP/Getty Images)

  • <em>Image has been reviewed by the U.S. Military prior to transmission.</em> A U.S. military guard tower stands on the perimeter of a detainee camp at the U.S. detention center for 'enemy combatants' on September 16, 2010, in Guantanamo Bay, Cuba. (John Moore/Getty Images)