Security tightened for London Marathon
April 21 , 2013
Security has been ramped up for the London Marathon today.
Around 36,000 runners are expected to take part in the race, the first in the World Marathon Majors series after two bombs exploded near the finish line of the Boston race on Monday killed three people and injured more than 170.
London's Metropolitan Police Service has announced a 40 percent increase in police officers deployed to secure the event.
They have maintained there is nothing to suggest a link between Boston and the London Marathon.
Runners will also wear black ribbons and observe a 30-second silence to honor the victims of the Boston Marathon bombings.