The officials, who remain neutral in the conflict that has splintered Yemen, say today's strikes hit the celebration in al-Wahga, a village near the Strait of Bab al-Mandab.
A senior government official says the strikes were "a mistake."
Yemen's conflict pits the rebels, known as Houthis, and forces loyal to a former president against the Saudi-backed and internationally recognized government. The US-backed, Saudi-led coalition has been carrying out airstrikes against the rebels since March. The conflict has killed at least 2,100 civilians, according to UN figures.