The former head of Citigroup Global Investment Management may be punished by the Securities and Exchange Commission for his role in activities under investigation at its mutual fund unit, the company said in a filing with the Commission Friday.

Thomas Jones, a former manager for the firm, may face an enforcement action because of an allegedly inappropriate relationship between Citigroup and a transfer agent for its Smith Barney family of funds. Along with Jones, one other former employee, as well as a current employee, were also notified of possible charges.

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