Police are investigating three robberies, where teens were threatened by armed men, which the force believes are linked.

The first incident happened at around 1.30pm on Wednesday, October 17.

Two men approached a 17 year-old boy in Wickford High Street, claimed to have a knife and stole his mobile phone.

At around 2.25pm a 16 year-old boy had his mobile phone taken by two men with a knife in the alleyway between Cornwall Avenue and the Lake Meadows car park in Billericay.

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We believe there was a woman who spoke to the men at the time of the robbery and we need to identify her and speak to her.

Then, a short time later, another 16 year-old boy was threatened by two men at Billericay Railway Station who then stole his mobile phone.

None of the victims were injured.

In each incident, the men were described to us by the victims as being black.

If you saw or heard anything or have any information about any of these incidents please call Basildon CID on 101 or Crimestoppers anonymously on 0800 555 111.