British police briefly evacuate London's Trafalgar Square near Jubilee celebrations 

A spokesperson said the incident was believed to have involved a suspicious package.

Police monitor crowds gathered in Trafalgar Square on Thursday on day one of the Platinum Jubilee celebrations. Picture: Stefan Rousseau/PA Wire

British police said on Saturday they had briefly evacuated London's Trafalgar Square, close to where celebrations are to be held later to mark Queen Elizabeth II's Platinum Jubilee.

However, police said the security alert had concluded shortly afterwards.