The traditional Christmas tree in London's Trafalgar Square was attacked with a chain saw early Monday, and authorites were deciding whether it could be saved.

The tree, which stands in the square through Christmas and New Year's was under police guard. Part of the square was closed to the public as a safety measure in case the Norwegian fir tree collapsed.Scotland Yard police headquarters said they were holding an unidentified man for questioning, and tree surgeons were to examine the tree.

The 100-foot tree is shipped annually from Norway as a gift to the British people for their efforts in World War II to defeat the Germans, who had invaded and occupied Norway.