-EDIT- Via Reddit http://www.reddit.com/r/news/comments/1cen3t/there_was_just_.../

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[1] https://twitter.com/Boston_to_a_T/status/323871088532668416/...

It looks like there has been a big explosion at the Boston Marathon, with some on twitter saying it looked like a bomb went off. Stay safe.

Update 1: Live video of the finish line: [2] http://boston.cbslocal.com/2013-boston-marathon-finish-line/

Update 2: Mass casualty event, potentially more bombs: [3] https://twitter.com/universalhub

Update 3: Not for the squeemish: [4] http://deadspin.com/explosions-reported-at-the-boston-marath...

Update 4: Boston Fire Dept. scanner: [5] http://www.broadcastify.com/listen/feed/497/web

Update 5: Another live feed: [6] http://www1.whdh.com/video/7newslive/

Update 6: Bomb Squad en route to Mass Ave. and Newbury: [7] https://twitter.com/universalhub/status/323878470750961664

Update 7: At least one runner lost both legs: [8] https://twitter.com/JesseRodriguez/status/323878089903964160

Update 8: Boston PD has reported at least 3 dead.

Update 9: Youtube video of the explosion itself: [9] http://www.youtube.com/watch?v=rfCK3Ar7Yus&feature=playe...

Update 10: State Trooper scanner says more devices potentially at Boylston and Gloucester.

Update 11: Fairmont Copley Hotel on lockdown as per WBZ.

Also, another link to the Boston Fire Dept. Scanner: [10] http://tunein.com/radio/Boston-Fire-Department-s145668/.

Update 12: List of scanners in Boston, including police scanner: [11] http://www.radioreference.com/apps/audio/?mid=13

Update 13: Another video of the explosion: [12] https://vine.co/v/bFdt5uwg6JZ

Update 14: EMS on scanner reporting for all personnel to be wary of trash containers.

Update 15: Numerous sources including scanners reporting secondary devices have been found unexploded, pleading with people to stay away from the area: [13] http://fox17online.com/2013/04/15/secondary-devices-found-un...