Man Critically Injured in Altercation on Westminster Bridge

London police confirm no terrorist link as four men are arrested following a violent dispute near Big Ben.

A man suffered cardiac arrest during a violent altercation on Westminster Bridge and is in critical condition in the hospital.
Initial reports of a stabbing were later corrected by police, who are investigating the exact cause of the cardiac arrest.
Four men were arrested in connection with the incident, three on suspicion of attempted murder and one for assault.
Two of the arrested individuals sustained head injuries and were also hospitalized.
Authorities have ruled out terrorism, describing the event as an isolated dispute between the individuals involved.