NEW : `` The situation is tense , '' a Yemeni government official says . It is not clear what set off the explosion . And separately , a Yemeni government official said both the air base and airport were shelled . ` A second bomb went off in an area controlled by al Qaeda militants near the city of Taiz on Friday morning and killed at least 10 people, according to local officials who spoke with CNN affiliate WAPA. Flights to Sanaa are being rerouted to Aden .
NEW : `` The situation is tense , '' a Yemeni government official says . It is not clear what set off the explosion . A second bomb went off in an area controlled by al Qaeda militants near the city of Taiz on Friday morning and killed at least 10 people, according to local officials who spoke with CNN affiliate WAPA. Flights to Sanaa are being rerouted to Aden .