Federal investigators are examining the activities of a broker at a local Smith Barney office in Albany in connection with their probe of the Senate Republican majority leader, Joseph Bruno, according to a source.

Investigators, who are looking into Mr. Bruno’s work for a Connecticut investment firm that manages millions of dollars of pension fund money for labor unions and contractors, are examining the records of financial advisers who acted as middlemen between the firm and the funds. The activities of the Smith Barney broker in Albany, Mark Caropreso, are a subject of interest of investigators, the source said.

Mr. Caropreso declined to comment.

The broker’s father is Anthony Caropreso, a major figure in Albany’s labor community — director of labor relations for the Eastern Contractors Association, a trade association of general contractors, subcontractors, suppliers, and service firms.

The younger Mr. Caropreso is on the board of directors for the association, according to the group’s Web site.

The elder Caropreso has held the position of trustee on pension funds, a source said.

In December, the New York Times reported that several labor union locals based in the Albany area invested millions of dollars of their pension fund money with Wright Investors’ Service, where Mr. Bruno began working as a consultant shortly before becoming majority leader of the Senate in 1995.

Mr. Bruno resigned from the job three weeks after the article was published. Officials for the company told the Times that Mr. Bruno’s work concerned “business development” but didn’t comment further.

An article in this week’s issue of New York magazine quoted Mr. Bruno explaining his responsibilities for Wright with more detail. “I provided the entree,” Mr. Bruno was quoted as saying. “In that business, the biggest problem is access. I provided access.” Describing his discussions with potential Wright customers, Mr. Bruno reportedly said: “My pitch to them was, ‘If you like what they have to say, take it to the next level. If you don’t, say goodbye.'”

A spokesman for Mr. Bruno said the comments in the magazine were taken out of context.

The Times Union of Albany reported last month that investigators issued subpoenas to several pension funds connected to the unions, including Laborers’ Local 190 and Teamsters Local 294. The paper reported that the subpoenas demanded records involving Mr. Bruno and his consulting company, Capital Business Consultants in Brunswick. Neither Mr. Bruno nor any one involved in the pension fund investments has been accused of any wrongdoing.