Three veterans' groups have sued the Department of Veterans Affairs over its handling of claims about contaminated water at Camp Lejeune.
Multiple media outlets report the lawsuit was filed by Vietnam Veterans of America; The Few, The Proud, The Forgotten; and the Connecticut State Council of Vietnam Veterans of America.
The lawsuit says between 1953 and 1987 nearly one million Marines, sailors, civilian employees and family members unknowingly used contaminated water at Camp Lejeune.
The lawsuit challenges the department's handling of claims stemming from medical problems suffered by those exposed to the water.
The groups say the claim approval rate has dropped from 25 percent to 8 percent since the program started in 2012.
An agency spokesman said he was not familiar with the lawsuit and could not comment.