Keywords beginning with stem word ‘bomb’ within first 20 minutes 

Two bombs just went off on boylston.....

Holy **** did a bomb just go off????

Sounds like a few bombs went off across the street

Two bomb sounds and a building on fire on one of the biggest days in Boston... Coincidence I think ****ing NOT

WTF the boston marathon just got bombed

Marathon got bombed wtf, thats right near my work

Koreans bombed Boston spread the word

I can't believe I just witnessed a bombing #blessedtobesafe

Two men had bombs strapped to themselves and they both went off. Everyone is scrambling.

I hate that my mom works at the airport I always think people are gunna bomb it

@***** it was 2 bombs! You okay?

Omg...omg....I was standing right down from where the bomb went off earlier

A bomb went off at the marathon?

O **** they calling bomb squad and FBI **** got real

Hoards of people being directed away from Copley Square where a #bomb went off at the #BostonMarathon… http://t.co/Aq6v2AqAqs

Two bombs just went off in Boston!? #wtf #BostonMarathon

@***** bombs went off in boston I have so many friends here who are in the area I'm so worried.

Two bombs went off during the marathon? #****edup

@***** I am yes, we only saw two big puffs of smoke and they sounded a lot like bombs