Vehicle strikes pedestrians on Seven Sisters Road in London in possible attack
Police officers guard the approach to Southwark Bridge after an incident near London Bridge in London, Britain June 4, 2017. REUTERS/Neil Hall

A vehicle - believed to be a van - has struck pedestrians on Seven Sisters Road near Finsbury Park in north London, causing "a number of casualties," police say. It was not immediately known if the incident is terror-related. The incident happened at about 12:20 a.m. local time on Monday when police were called to Seven…