At least 10 students, including six of Indian origin, were injured in two separate incidents in London after a gang of white and black youth attacked Asian Muslim students at a University campus last week.
Police said they are investigating the "two racially motivated incidents" that occurred on November 2 and November 5 at the City University in north London.
Six of the 10 students attacked in the incidents sustained serious injuries, including four who had stab wounds, a spokesperson of the Federation of Student Islamic Societies said on Tuesday.
"One Pakistani origin student suffered bruise to his brain and suffered memory loss and has been sent to his home in Luton," the spokesperson told PTI.
He said six students of Indian-origin were among the injured and their condition was stated to be under control.
The first incident occurred outside a City University building on Nov 2 when a group of Asian men were attacked by a group of black teenagers who shouted racist abuse and threw bricks at them.
A 21-year-old man sustained head and facial injuries and bruising to his legs and was taken to University College hospital for treatment, the spokesman said.
Minutes earlier, there was an altercation involving the same group of black men who shouted racist abuse at students in a prayer room at the City University campus.
In the second incident that occurred on Nov 5, police were called to St John Street to reports of a fight involving a large group of black and white men armed with sticks and poles.
Police said they know of six Asian victims, four of whom sustained stab wounds. Two victims sustained cuts and bruises.
The details of all the victims were not available.
Three people were arrested in connection with this incident and have been bailed, with conditions to return to police station on January 4, 2010.
Superintendent John Sutherland from Islington Police said: "We're treating both incidents very seriously. We have made a number of arrests in connection with Thursday's incident and the investigation is ongoing".
He said the Muslim and local community can be reassured by the fact there are dedicated police patrols in this area and crime prevention measures have been put in place with the university.