The statement said F-16 fighter jets carried out the raid around al-Sousa village in eastern Syria, as "30 leaders from Daesh gangs" met in the building, Reuters reported.
The strike came a day after Iraq's government hinted at greater involvement for its armed forces in Syria as the US begins withdrawing troops from the country.
Baghdad has carried out several air raids in Syrian territory with the agreement of President Bashar Assad. Its army has reinforced at the border in recent months.