The House Ethics Committee is investigating Democratic Del. Michael F.Q. San Nicolas of Guam in response to allegations he misused campaign funds and was having an affair with a woman working in his congressional office.

“The Committee is aware of public allegations that Delegate Michael F. Q. San Nicolas may have engaged in a sexual relationship with an individual on his congressional staff, converted campaign funds to personal use, and/or accepted improper or excessive campaign contributions,” the 10-member bipartisan ethics panel announced in a statement Thursday.