TWO leading international human rights groups today accused Greek authorities of failing to properly investigate the circumstances around a migrant boat sinking six months ago in which hundreds were killed.

In a joint report, Amnesty International and Human Rights Watch said “little meaningful progress” has been made in examining allegations by some survivors that the rescue mission was delayed and mishandled.

Up to 750 people were believed to have been crammed into the Adriana, a rusty fishing trawler that sank on June 14, south-west of the Greek mainland while travelling from Libya to Italy.