Nine Egyptian men are due to appear in court in Greece in connection with the sinking of a trawler last week that was carrying hundreds of migrants.
Seventy-eight people are confirmed to have died in the disaster but hundreds more are feared to have drowned.
The nine suspects are accused of people-smuggling and other offences.
They were arrested after survivors said they took turns steering the boat, giving orders and communicating with the Greek coastguard.
The Greek authorities are facing mounting questions about whether did enough to prevent the shipwreck.