A pupil at Coombe Boys' School in Kingston has claimed diplomatic immunity after allegedly assaulting two other boys.

An anonymous caller has explained the boy, the son of a Jordanian diplomat based at the embassy in central London, had allegedly assaulted two other pupils last Thursday afternoon before pulling out a knife and threatening them - but police were unable to confirm this.

He was then allegedly restrained and the police were called.

Headteacher Carol Campbell, who celebrated 10 years in post last month, said the boy had only been at the school for a couple of weeks.

He became involved in a skirmish with two others outside the school gates after school on Thursday last week. Nobody was hurt and the school is currently investigating the incident. Details have been passed to the Met's Diplomatic Unit which is also carrying out an investigation.

The Jordanian Embassy has not responded to request for a statement on the case. Diplomatic immunity means recognised foreign diplomatic staff and their immediate family cannot be prosecuted for crimes under the host country's laws.

Only the diplomat's country of origin can choose to waive the immunity of its own staff, although the host country can expel them from the country.

The claim of immunity will cause anger, given recent efforts to clamp down on knife culture, following the stabbing of Mikey Brown in The Works nightclub.

The incident took place on the same day as more than 100 people were searched when knife arches were erected outside Kingston train station.

Police arrested one man for possession with intent to supply drugs and a public order offence and a second was given a formal warning for possessing drugs after a two-hour blitz by officers between 8am to 10am on September 27.

Chief Inspector of Operations, Cliff Law, said: "Any persons found in possession of offensive weapons or knives can expect to be dealt with robustly."