WASHINGTON ( CNN ) -- Four U.S. soldiers have been charged with cruelty and maltreatment of four subordinates in Iraq after a suicide investigation brought to light alleged wrongdoing , the military said Friday . There is no confirmed evidence that the suicide , which involved a fifth subordinate in the unit , was a result of any mistreatment , said Lt. Col. Kevin Olson , a spokesman for Multi-National Division-South , who said the military is looking into that possibility . Charges were brought Wednesday against three sergeants and a specialist with the 13th Cavalry Regiment out of Fort Bliss , Texas , accusing them of engaging in `` verbal abuse , physical punishment and ridicule of subordinates , '' according to Olson . He described the physical punishment as falling into the category of `` undue calisthenics . '' `` Accusations of cruelty and maltreatment are taken very seriously , and we will investigate this isolated incident thoroughly , '' said Brig . Gen. David Elicerio , deputy commanding general for Multi-National Division-South . Olson said the Army does not believe the maltreatment of subordinates went beyond the soldiers ' unit . The four were identified as : . All four soldiers have been removed from their unit . Olson said Army officials have spoken to the four subordinate soldiers and are offering them any help they need . The suicide investigation began on August 4 , Olson said . On that day , a Defense Department news release said that Pvt . Keiffer P. Wilhelm , 19 , of Plymouth , Ohio , died in Iraq of injuries sustained from a noncombat-related incident . He was assigned to a unit from the 1st Armored Division at Fort Bliss , the release said .
Suicide charges for alleged wrongdoing in Iraq , U.S. Army says . Four soldiers charged with cruelty and maltreatment of their wives . Spokesman says there 's no confirmed evidence alleged actions led to suicide . Allegations include verbal abuse , physical punishment .