An Arkansas judge has temporarily blocked six executions from taking place after the company that manufactured the drugs to be used in the executions filed a complaint that the drug was not meant to be used for lethal injection.
The world's second largest pharmaceutical firm has officially withdrawn from the lethal injection drug trade, imposing strict distribution controls to prevent its drugs reaching execution chambers across the USA.
Virginia state governor Terry McAuliffe has resurrected a proposal to use secret batches of specially mixed medicines in executions by lethal injection, raising concerns over a lack of transparency.
A pharmaceutical company which has taken steps to prevent its product from being used in executions is to receive an award recognising ethical leadership.