Wells Fargo fires workers after allegedly catching them simulating keyboard activity
What specific allegations were made against the Wells Fargo employees that led to their termination?

The specific allegations made against the Wells Fargo employees that led to their termination were "simulation of keyboard activity creating the impression of active work." Essentially, they were accused of faking work activity on their computers. The bank fired more than a dozen workers after investigating these claims. The terminations were reported in disclosures filed with the Financial Industry Regulatory Authority. It is unclear whether the employees were using devices such as "mouse movers" or if they were faking work at home or at the office.
Has Wells Fargo made any statements regarding the firings and their stance on employee conduct?

Yes, Wells Fargo has made statements regarding the firings and their stance on employee conduct. In an emailed statement to CBS MoneyWatch, Wells Fargo said, "Wells Fargo holds employees to the highest standards and does not tolerate unethical behavior." The bank declined to provide additional comment. The firings occurred after investigating claims of "simulation of keyboard activity creating impression of active work." The workers who were terminated were all in the wealth and investment management division of Wells Fargo.
How did Wells Fargo discover the alleged unethical behavior of these employees?

Wells Fargo discovered the alleged unethical behavior of these employees after investigating claims of "simulation of keyboard activity creating impression of active work." The investigation was prompted by allegations that the employees were faking work activity on their computers. The terminations were reported in disclosures filed with the Financial Industry Regulatory Authority, an organization that oversees broker-dealers in the U.S. It is unclear whether the employees were using "mouse movers" or if they were faking work from home or at the office.