Deri, 15 has been missing from his home since February.
Following further sightings in Watford of a teenager who went missing in February, police are re-appealing to members of the public for information.
Deri Tomas-Kawumba, 15, went missing from his home address in Watford on Thursday, February 19.
Since that time there have been a number of sightings of him around Watford, which is where he is believed to still be.
Deri, who speaks with a French accent, is described as black, of thin build, with brown hair. He was last seen wearing dark blue jeans, a black coat and grey hooded top.
Police need to know that Deri is safe and are asking him to make direct contact.
Anyone with information about his whereabouts should call Herts Police via 101.
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