Carlos Cuesta-Rodriguez put to death by Oklahoma in first of three executions scheduled on same day

If all executions go ahead, it will be first time in over 15 years there have been over three judicial killings in US in one day

Carlos Cuesta-Rodriguez has been put to death by the state of Oklahoma, in the first of three executions scheduled for Thursday in a rare triple procedure that underlines the renewed appetite in the US for state killings.

Cuesta-Rodriguez, 70, was sentenced to death for murdering his common-law wife Olimpia Fisher in 2003. He had unsuccessfully appealed for mercy, saying he was remorseful and had struggled all his life from mental illness.