Scott Silvestri, a spokesman for Bank of America, which bought Merrill in December, would not respond to that claim, but said in a statement, “The safety and security of our associates is paramount, and we will always take the appropriate steps.”

And there may be more protests. The Connecticut Working Families party, which has support from organized labor, is planning a bus tour of A.I.G. executives’ homes on Saturday, with a stop at the company’s Wilton office.

“We’re going to be peaceful and lawful in everything we do,” said Jon Green, the director of Connecticut Working Families. “I know there’s a lot of anger and a lot of rage about what’s happened. We’re not looking to foment that unnecessarily, but what we want to do is give folks in Bridgeport and Hartford and other parts of Connecticut who are struggling and losing their homes and their jobs and their health insurance an opportunity to see what kinds of lifestyle billions of dollars in credit-default swaps can buy.”

A.I.G. paid the $165 million in bonuses to 463 of its executives, but in the uproar that erupted when the payments were made public, Mr. Liddy asked the employees to return much of that money. He said that many of them have agreed to do so.

The New York attorney general, Andrew M. Cuomo, said on Thursday that A.I.G. had handed over a list with the names of the bonus recipients. But he did not release the list. “We are aware of the security concerns of A.I.G. employees,” Mr. Cuomo said in a statement, “and we will be sensitive to those issues by doing a risk assessment before releasing any individual’s name.”

It was unclear exactly what measures the officials at A.I.G. have taken in the name of protecting the company’s executives. Officials at several police departments in Connecticut towns where A.I.G. executives live said they did not know about possible threats against the bonus recipients. “We haven’t heard of it,” said Sgt. Carol Ogrinc of the New Canaan police. “There have been no complaints made to our department.”

But several security companies in New York credited the financial crisis with a noticeable increase in some areas of their business, from protecting executives to dispatching bomb-sniffing dogs to check for trouble. “There is certainly anger among people about the economy and fear among corporate executives themselves,” said Patrick Timlin, the president of Michael Stapleton Associates, which provides bomb-dog teams.