A teenage boy has been arrested on suspicion of murdering a 15-year-old cyclist following police raids targeting drug dealing in Portsmouth.
Alan Cartwright was fatally stabbed while cycling in a north London street in February.
The 17-year-old murder suspect was also arrested on suspicion of supplying of class A drugs.
Ten people have been by detained police after three warrants were carried out as part of a drugs crackdown.
Those arrested are from Portsmouth and London and are suspected of supplying a range of drugs from cannabis to cocaine and heroin.
Seven people were later bailed until varying dates in September and October. Two men in their 20s, from London, are being questioned.
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