LINCOLN, Neb. (AP) — One of two former Black Panthers convicted in the 1970 bombing death of an Omaha police officer has died in prison. Nebraska Department of Correctional Services spokesman Andrew Nystrom says David Rice died around midnight Saturday at the state penitentiary in Lincoln.

The 68-year-old Rice, who is now known as Mondo we Langa, was convicted along with fellow Black Panther Edward Poindexter in the death of officer Larry Minard.

Authorities say they lured police to a house with a 911 call, then detonated a homemade bomb that killed Minard. The pair maintained their innocence and argued they were targeted by an FBI program that undermined radical political groups.

Rice’s death will be investigated. Nystrom says the cause hasn’t been determined, but he was being treated for chronic obstructive pulmonary disease.