The captain of a private aid ship that engaged in migrant rescue missions is accusing Italy and Malta of hiding a deadly "farce" in the Mediterranean Sea.

Claus-Peter Reisch, who faces trial in Malta for allegedly captaining a ship that wasn't properly registered, said Monday in Munich that he's done nothing wrong.

Both Italy and Malta have impeded aid groups from operating rescue boats, either by refusing them entry to their ports or by impounding their vessels and putting their crews under investigation.

The 57-year-old Reisch, who captained for German aid group Mission Lifeline, said he believes about 100 migrants are dying daily in the Mediterranean, and accused the governments of trying to hide the death toll.

He said: "The curtain is being drawn over this farce, in which many people are dying, so nobody in the world can see it anymore."

The second group of migrants that disembarked in Malta left for Luxembourg on Sunday. 

The MV Lifline is currently impounded at the Grand Harbour