Parents were put on alert today after a man approached children in a post office.
A mother called police after he spoke to her four young children in a post office in St James's Street, Brighton.
He asked whether they were all together or on their own.
The same man was seen later lifting the curtain of a photo booth and speaking to the child inside.
Inspector Julie Wakeford of Brighton police said: "We would urge everyone to be vigilant."
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