Social Media Plays Role in Response to Marathon Bombing

Workers aid an injured woman at the scene of the blast Monday

Workers aid an injured woman at the scene of the blast Monday Charles Krupa/AP

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Events are unfolding on the ground and online.

This story has been updated.

Here’s a quick inventory of the role social media is playing in the response to Monday's bomb explosions at the Boston Marathon finish line that has caused at least two deaths so far.

The Boston Police Department began tweeting confirmed news about 45 minutes after the first explosion @Boston_Police. The police department was one of thousands tweeting about the events under #bostonmarathon and related hash tags.

Web watchers also can follow the Boston police and emergency scanner online.

Google has launched a Person Finder to help find or report missing people from near the race. The Red Cross is offering a similar service.

Racers themselves can be tracked at the Boston Marathon site through chips in their socks. 

The Boston Globe has set up a Google document for stranded runners seeking housing and people willing to put them up. 

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