The searches took place in North Street, Albion Terrace and Windsor Crescent.
One person was arrested on suspicion of drug dealing, a man who police had been looking for was arrested and suspected drugs were seized.
The raids were part of an ongoing crackdown called Operation Galaxy.
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Anyone with information about drugs in their area should call police via 101 or information can be passed on anonymously via Crime Stoppers on 0800 555111.