The Senate Ethics Committee opened a preliminary inquiry Thursday into allegations of sexual misconduct against Sen. Al Franken.

“While the committee does not generally comment on pending matters or matters that may come before it, in this instance, the committee’s publicly confirming that it has opened a preliminary inquiry into Senator Franken’s alleged misconduct,” panel leaders said in an announcement.

Five women have come forward with allegations that the Minnesota Democrat engaged in unwanted sexual activity. Franken has said he will continue to retain his seat.

Watch: Franken ‘Tremendously Sorry’ After Sexual Misconduct Allegations