Four staff members were injured on Tuesday when a student attacked them with a knife in a school in the Norwegian capital Oslo, police said.
The student was arrested but the motive was not immediately clear, The Independent daily reported.
The four victims, all employees at Brynseng School, were taken to hospital with minor injuries.
An Oslo Police official described the suspect as "very young". He said an investigation had been launched.
The common factor among all the professionals, from non-European Union countries like India, Pakistan, Bangladesh and Nigeria, is that they were in the UK on a Tier 1 (General) visa.
Two Indian-origin siblings, with severe nut allergies, were allegedly told by an airline to "sit in the loo" while the cashews were being served on the flight, media reports said.
Many took to Twitter to condemn his words, including former Ulster Unionist leader Mike Nesbitt who said it could only be interpreted as a racist comment.
The US has been pressing Pakistan to release Dr Shakil Afridi, who was involved in a CIA-linked plan to find bin Laden with a fake vaccination operation in the Pakistani garrison city of Abbottabad.
United States President Donald Trump has hailed the late Indian American astronaut Kalpana Chawla as an inspiration for millions of American girls.
An Indian-origin family has been rescued after a fire in their residential complex here, officials said.