A Southampton school is warning parents to collect their kids today after a boy was threatened at knifepoint by another teenager.

Staff at Redbridge Community School had to step in to save the 12-year-old after a teenage boy wearing a balaclava threatened him with a penknife just before 8.30am.

The offender then told the pupil to hand over his bike but fled the scene when staff arrived.

After threatening the student, police say the boy also damaged a black Renault Clio while the driver and her children were in the car.

He then made off on a yellow or lime green push bike.

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Headteacher, Jason Ashley, stressed the boy is "not one of our students".

In a text message to parents, seen by the Echo, the school is now asking parents to collect children who would normally walk home.

The message reads: "We have been made aware of a safety alert in the local area with an unknown male at Redbridge Community School this morning.

"You may want to consider collecting any children who would normally walk home."

Earlier today, an email was sent out urging parents "to be alert, report to us any issues and ensure that your son/daughter walks home in groups".

Police investigating the attempted robbery in Cuckmere Lane are asking for the public's help.

The teenage boy is described as 15 to 16 years old, white, of slim build, 5ft 8ins tall.

He was wearing a navy blue Nike tracksuit, a navy blue man bag, a black coat and a black balaclava.

Anyone with information should call 101 quoting 44220208134 or 44220208131.

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