Texas on Thursday executed a 53-year-old man for the 2004 murder of an elderly woman, marking the state's 600th execution of the modern era.

Edward Busby's execution had been on hold for nearly a week but a decision by the Supreme Court on Thursday allowed it to move forward.

A man who experts said was intellectually disabled has become the 600th person executed in Texas since the state resumed carrying out the death penalty in 1982.