A Gravesend school has warned pupils to avoid the town centre amid “increased tensions” after a boy was stabbed last month.

In a letter to parents, Gravesend Grammar School advised that students should “not hang around unnecessarily” in the area after school.

It follows an incident on June 15, where a 16-year-old was stabbed in a “sustained and brutal" assault on Milton Road.

In the letter, sent on Friday, Headteacher Malcolm Moaby wrote: “We have some concerns that there is increased tension in the area and feel that it is appropriate to give more advice following discussions with the authorities.

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“I am speaking to all students and will be strongly advising the following until the end of term.

“Students should not hang around unnecessarily in Gravesend town centre before or after school.

“If travelling further afield on bus, train or ferry to take the earliest possible train, bus or ferry.

“Avoid known crime hotspots in Gravesend such as Woodlands Park and the Promenade.

“Avoid engaging in social media that may be inciting violence.

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“I do not believe that students need to change their current transport arrangements but, instead, take sensible precautions until the end of this academic year.”

Last month’s victim suffered multiple injuries after he was attacked close to the junction with Albion Road, at around 12.45pm on Tuesday, June 15.

He is recovering from his injuries.

Officers are pursuing a number of lines of enquiry, including forensic checks and speaking with potential witnesses.

They have released an image of a suspect who they believe can assist their investigation.

Detective Constable Kelly Tindall of North Division CID said: "Thankfully the victim is continuing to recover from his injuries. This was, however, a sustained and brutal assault which could easily have led to far greater harm.

"As a result of our enquiries, we have identified a man who we think has important information on the incident and I would encourage him, or anyone who recognises him, to contact us as soon as possible."