Gibraltar police said on Friday that all four crew members of the Iranian Grace 1 tanker have been released on bail without charge .
Gibraltar police said earlier on Friday that they had arrested the two second mates from the tanker, a day after the vessel’s captain and chief officer were arrested.
In a statement, the police said all four crew members were granted bail with conditions. It did not elaborate, but said the investigation was ongoing and that the Grace 1 continues to be detained.