Sure, but you also may have wall problems. Often, moisture in walls is due to having the interior humidity way too high (about 30-40-ish% RH is recommended) and/or poor air sealing. Air leakage carries water with it, then hits something cold and freezes. Do you have fiberglass insulation? Old house, or new?
I have icicles on exterior walls. It has not rained or snowed in last several days. Can steam heat pipe leak in the wall and cause condensation?
Once the steam leaves the pipe it condenses. You should be able to trace the steam pipes in this area to determine if they are the cause. You should also look into the water supply and the drain systems in the house.
If you can't find it this morning, call someone or the damage to the house can be substantial.