ATLANTA — A man convicted in the killing of a fellow inmate has been executed in Georgia despite claims by his lawyers that he was intellectually disabled.

Warren Lee Hill was put to death by injection of a single drug Tuesday at the state prison in Jackson. The 54-year-old was pronounced dead at 7:55 p.m. He did not make any final statement.

Hill had previously come within hours of execution on three separate occasions, but courts granted temporary reprieves each time. The Supreme Court on Tuesday denied a stay, however.

His lawyers argued Hill was intellectually disabled and shouldn't be executed. The state argued the defense failed to prove beyond a reasonable doubt that Hill is intellectually disabled.