Italian officials have said they have found four more bodies in the wreckage of the cruise liner, Costa Concordia.
Thirty-two people are believed to have been killed after the cruise ship crashed in Italy last month.
Italian official Francesca Maffini said: "Bodies of victims have been located. It seems there are four. The operation to recover them is under way."
Lawyers for survivors of the tragedy are pressing for new drug tests to be carried out on Schettino after the initial results were published this weekend.
Italian consumer protection group Codacons, which is representing some of the survivors, said traces of the drug were found on a hair sample and in an envelope containing the sample, but noted a urine sample and analysis of the hair did not yield evidence of cocaine.
Since the ship struck rocks off the island of Giglio, pictures of the sinking ship the Costa Concordia have been seen on news sites around the world, showing the liner semi-submerged in the surrounding sea.
It called the cocaine findings “very strange” and said it had requested new testing to see if the samples might have been contaminated, AP said.