Students from a London University college caused damage put at thousands of pounds to a neighbouring college during an end-of-term party.
King's College students are asked not to retaliate
London School of Economics (LSE) students attacked the English department at King's College during the Athletics' Union Barrel annual run.
An LSE spokesman said they "deeply regret" the incident on 2 December and promised to pay the cost of repairs.
Representatives from both colleges are now investigating the incident.
A spokesman from King's College said the exact cost of repairs was still unknown although it was thought it would run into thousands as glass had been broken, fire extinguishers and fire alarms set off and ceiling tiles pulled down.
The two colleges are just yards apart on the Strand but it is not known what sparked the incident.
Rick Trainor, principal of King's, has asked students not to carry out any retaliatory attacks.
In a statement, the LSE Student's Union said they "strongly condemn" the actions of a splinter group of individuals from the Athletics' Union Barrel.
It read: "We have already met with representatives from King's College, King's College Students' Union, LSE and King's College Security.
"We have offered our most sincere apologies and promised to cover the costs of repair to property.
"A full and thorough investigation is now under way and the Students' Union is working with the LSE to take appropriate action against the individuals involved.
"The Athletics' Union Barrel is intended to be a light hearted end of term event and we are enormously disappointed that this was not the case this year."
Howard Davies, director of the LSE added: "It is very disappointing that a group should have allowed what is normally an enjoyable day to degenerate into an incident which has shamed the school."