All eighteen were scheduled to go before a court yesterday either in Palma or Inca.
17 Illegal immigrants make a run for it in Ibiza.
The last major breach of the border fence by illegal migrants occurred in August last year when 118 migrant made it onto Spanish soil.
Another boat comes to the Balearic shores in less than two days.
All are said to be North African and were in police custody.
The illegal immigrants came in four "patera" boats; most of the 43 arrived in Cabrera.
300 illegal immigrants have tried to come ashore in Spain in the past 48 hours.
A third boat with sixteen people was intercepted early this morning (Wednesday). Eight more illegal immigrants came in via Formentera.
According to the court, the Balearic government exceeded its powers when it restored health care to people without residence permits.
Another boat with illegal immigrants was intercepted off Cabrera yesterday. The second in two days.
Fourteen people are said to have been on board the boat intercepted today.
The vessel, on board which were a total of 14 illegal immigrants, was towed by a search and rescue vessel to Colonia Sant Jordi.
The number of people apprehended by the Guardia Civil and handed over to the National Police has now risen to 28.
Within 72 hours, the immigrants will be transferred to a detention centre on the mainland and await deportation.
The fourteen people arrested are from Algeria.
It was beached between Cala Pi and Cap Blanc and its discovery sparked a search for its occupants.
Following a chase through the streets, four people were eventually arrested.
Ten illegal immigrants were picked up in Santanyi, where there have been four landings by immigrants since 2014.
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