Forensic authorities in the Dominican Republic worked Wednesday to identify the remains of at least 14 mostly decomposed bodies found on an abandoned vessel 10 nautical miles of its northern coast.

The Dominican Republic Navy said the 14 skeletons appeared to belong to individuals from Senegal and Mauritania, according to the documentation found next to the bodies.

Authorities are also working to determine the cause and time of the deaths and whether 12 packages of a substance found on the boat contained illicit drugs, presumably cocaine or heroin.

Cell phones and geolocation devices were also found on the boat, the Navy said.