Six days after runners, spectators and volunteers were terrorized at the 2013 Boston Marathon, those attending another 26.2 mile race paid their respects to Boston today. The 2013 Virgin London Marathon took place in the U.K. on Sunday, April 21, and the Hub was top of mind for those in attendance.

All 36,000 runners in London’s race were given a black ribbon to pin to their outfits in commemoration of the lives lost during the Boston Marathon bombing.

There was also a wall for London racers to leave messages to those in Boston.

In further solidarity, there was an observed 30-second moment of silence at 10 a.m. on Sunday, prior to the men’s elite and mass start, in honor of the Boston Marathon bombing victims.

The London Marathon commentator told the crowd before the moment of silence:

Marathon-running is a global sport. It unites runners and supporters on every continent in pursuit of a common challenge and in the spirit of friendship and fellowship.

This week the world marathon family was shocked and saddened by the events at the Boston Marathon. In a few moments a whistle will sound and we will join together in silence to remember our friends and colleagues for whom a day of joy turned into a day of sadness.

Let us now show our respect and support for the victims of the tragedy in Boston.

Additionally, the Virgin London Marathon pledged Ł2 – about $3 – to The One Fund Boston for every runner that crossed the finish line – amounting to around $100,000 in total. Runners were encouraged to cross the finish line in London with their hands over their hearts in commemoration.

Organizers of the event beefed up security for Sunday’s race, adding 40 percent more police officers than last year. Despite the heightened security, spectators came out in droves to cheer on the runners, displaying clothing and signs with “Boston” emblems in support.

Check out photos of ways the London Marathon shower their support for Boston in the slideshow below.