The Mauritanian Coast Guard has rescued a group of seven migrants from a stranded boat in the coastal Atlantic, though 47 other passengers are feared dead, the International Organization for Migration said.

The boat was carrying West Africans trying to migrate to Spain’s Canary Islands, off northwest Africa, according to IOM’s Missing Migrants Project.

Just days after their boat departed on August 2 from Morocco, the engine broke down and the vessel drifted for two weeks. Without adequate food or water and not knowing where they were going, passengers began to die off.