Watchdog groups have issued a warning about charity scams related to the Boston Marathon tragedy.
Dozens of web domains were registered within hours of the attack.
One fraudster set up a Twitter account, claiming to be associated with the Boston Marathon organization, which was quickly shut down.
You can check to see if an organization is credible by searching here: http://www.charities.pa.gov/
You can also call 1-800-732-0999.