Nigeria Executes First Prisoners Since 2006

There are an estimated prisoners 1,000 on death row

(Reuters) - Four prisoners have been hanged in Nigeria, an official said on Tuesday, in the first known executions since 2006 which Amnesty International described as "a truly dark day for human rights in the country".

Nigeria has faced international criticism over its death penalty and an estimated 1,000 people are on death row.