Seventeen migrants were detained by the Guardia Civil on Friday, a boat having been found by the National Police at Cala Murada in Manacor.
Five of the migrants were in the Cala Murada area; the other twelve were intercepted on the road between Portocolom and Felanitx.
A boat found in Tolleric, Llucmajor on Friday is believed to have been one which brought eleven migrants earlier in the week.