He was placed under surveillance and his activities and phone calls were monitored 24 hours a day, Moroccan officials said.
Moroccan officials believe that the cellular telephone detonator used in the bombings was developed here.
Moroccan officials hope that Jordan will provide a model.
Moroccan officials said five security personnel had been killed in the unrest.
Moroccan officials say there is no chance of a truce or cease-fire with the Polisario for the moment.
Moroccan officials said they were investigating several people in the country's impoverished north, a region once administered by Spain.
Predictably, perhaps, Moroccan officials voice little doubt about the outcome of the vote.
The Moroccan official said a solution would reduce tension in the region.
Diplomats and Moroccan officials said the new King's interests range well beyond military matters.
Moroccan officials could not be reached for comment on Friday.