Dennis Crowley Is Live-Tweeting the Aftermath of the Boston Marathon Explosions

(Photo: Dan Lampariello, via Twitter)

(Photo: Dan Lampariello, via Twitter)

Earlier this afternoon, two huge explosions ripped through downtown Boston near the finish line of the Boston Marathon, injuring spectators and athletes alike. It’s still very unclear what’s going on, but there’s a familiar face reporting in from the scene. Foursquare CEO Dennis Crowley was running the marathon today–you might have seen his automatic check-ins from every milepost, interspersed with the occasional mid-stride misspelled tweet.

But the auto-updates suddenly stopped. After reassuring everyone he was fine, Mr. Crowley began tweeting dispatches from the middle of the race:

Reports suggest that cell service in the area is overwhelmed, so don’t panic if you can’t reach someone and texting is likely better than calling.

Someone has already posted a Vine of the explosion itself, grabbed from news coverage, and it’s frankly horrifying. @Dens and everyone else in Boston–stay safe.