"Federal prosecutors say criminal charges have been filed against 14 people, including attorneys and Wall Street professionals, in a widening $25 million insider trading case that has already snared one of the richest men in America," the Associated Press writes.

The wire service adds that:

 

According to court papers filed in U.S. District Court in Manhattan against seven of the individuals, a man who worked at Galleon Group identified as Zvi Goffer operated an insider trading network in 2007 that included a lawyer who fed tips gleaned from his firm's work on acquisition deals.

Last month, authorities arrested Galleon Group founder Raj Rajaratnam and five others in an insider trading scheme that the Securities and Exchange Commission estimated produced $25 million in profits for its participants. A bail hearing for Rajaratnam, who is free on $100 million bail, was scheduled for later Thursday.

Bloomberg News reports that:

According to today's court filings, some of the defendants traded on inside information related to Bain Capital LLC's proposed buyout of 3Com Corp. ... Prosecutors and the FBI declined to comment on any connections between the arrest of Rajaratnam, a billionaire, and today's charges.

The Wall Street Journal says the FBI "has taken seven people into custody surrounding the probe. The New York office of the FBI said the individuals were primarily taken into custody in New York."

The Business Insider has posted some details from today's court documents.