The temporary accommodation was arranged as part of an agreement to drop all charges against Mr Koroma.
The coup plotters were also said to have fired shots at the presidential lodge, where Mr Bio is heavily guarded.
The suspects had intended to cause disruption across the country under the pretexts of upcoming protests, according to information uncovered by the police.
Sierra Leone on Monday counted the presidential election votes following violence and the death of an opposition party volunteer.
Many people rushed to siphon fuel after the accident but the truck exploded shortly afterwards.
