The reason for the alleged arrests is unclear.
Health Minister Ali al-Shemari said the soldiers broke open doors inside the building leading to his office and hauled away the seven men, who were posted there as night guards.
Al-Shemari condemned the raid as "a flagrant attack against an institution, an elected institution."
U.S. officials did not immediately respond to the allegation.
Al-Shemari, a Shi'ite, said there was no legal warrant or any reason to arrest the men. He called the action a "provocation."