A SECONDARY school was put on lockdown after a teenage girl was arrested for allegedly bringing in a knife.

       The alert was raised at Durrington High School in Worthing, West Sussex, this morning.

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       The school was put into lockdown after concerns were raised about a knife

       Parents said their children were hiding under tables in classrooms after the blade was spotted shortly after 9.30am.

       Co-headteachers Shaun Allison and Chris Woodcock sent parents an email saying: “As you will be aware there was a serious incident in school this morning where a young person came onto the site in possession of a knife.

       "We immediately went into lockdown and within five minutes the police were on site and assisted staff to bring the incident under control.

       "No one was harmed. We would like to thank our students and staff for their excellent response. The young person has been arrested and we are assisting the police with enquiries."

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       In a post on Facebook, the school insisted: "There is no further threat to students or staff."

       Sussex Police said in a statement: "At 9.37am on Thursday, July 20, police were called to Durrington High School to a report of a teenager believed to be in possession of a knife.

       "Officers attended and at 9.43am a teenage girl was safely detained.

       "She has been arrested on suspicion of a blade article in a public place and remains in police custody at this time."

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       Worthing's chief inspector Sarah Leadbetter later said: "I would like to reassure the public that this was a fast-moving, contained situation in which no-one was harmed and there is no wider safety risk."

       Durrington High School was previously one of 11 in the Worthing area writing to parents with warnings of "ongoing reports of violence and anti-social behaviour", according to The Argus.

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       Sussex Police were called to the scene and arrested a teenage girl 3

       The school's co-headteachers emailed parents about the 'serious incident'