(Washington, DC)  --  Federal officials say 126 new domain names having to do with the Boston Marathon bombing were registered within four hours of the tragedy.  In a document circulated by the Department of Homeland Security, cyber security officials say some of the domain names are likely to be used by spammers, scammers and "other malicious actors" to take advantage of those interested in the bombing.  Massachusetts Attorney General Martha Coakley echoed the federal warning, saying that some people will be well-intentioned, but others will be trying to commit fraud.