Several large explosions shook an air base outside the Yemeni capital, Sana'a, prompting authorities to temporarily close the city's nearby international airport Sunday.
Yemeni authorities said mortar shells landed at the al-Daylami air force base, a few kilometers from the airport, causing a massive blast and sending up huge plumes of smoke.
Flights were temporarily rerouted from Sana'a International Airport to the southern port city of Aden.
There were no immediate reports of casualties. CNN quotes a Yemeni government official as saying the base was shelled by opposition forces.