The Navajo Nation’s lawsuit filed Wednesday in U.S. District Court in New Mexico seeks unspecified damages and attorney fees.

The tribe says American Indians have suffered disproportionately from opioid dependency or abuse, leading to death, family dysfunction, poverty and social despair.

The tribe says it has helped cover costs of treatment for opioid abuse, and for law enforcement and social services to respond to the epidemic.

One of the defendants denied the allegations. Others say they are working to help combat the opioid epidemic and have reported suspicious orders to the federal government.

Others declined to comment or did not reply to requests for comment.