"Bank of America joins in the actions previously announced by MasterCard, PayPal, Visa Europe and others and will not process transactions of any type that we have reason to believe are intended for WikiLeaks," the bank said in a statement issued Friday. "This decision is based upon our reasonable belief that WikiLeaks may be engaged in activities that are, among other things, inconsistent with our internal policies for processing payments," the bank said.

The reaction from WikiLeaks, which on November 28 sparked global controversy by presenting a cache of 250,000 leaked U.S. embassy cables, was swift. "Does your business do business with Bank of America?" said late Friday. "Our advise is to place your funds somewhere safer."

WikiLeaks founder Julian Assange said in an interview with CNBC Friday that WikiLeaks would soon release information about banks. In an interview with Forbes magazine last month, he said WikiLeaks was prepared to reveal information on a bank that would show "unethical practices."

In the recent interviews, Assange did not name a speficic bank, but in an last year, he said "we are sitting on 5GB from Bank of America, one of the executive's hard drives."

At that time, Assange said WikiLeaks was mulling over how to present the data. "It's a difficult problem. We could just dump it all into one giant Zip file, but we know for a fact that has limited impact. To have impact, it needs to be easy for people to dive in and search it and get something out of it."