MOGADISHU, Somalia—Simultaneous large explosions were heard in and around two Somali army bases on Saturday, with the military confirming that at least nine staffers were killed but asserting the attackers had “heavy losses” of dozens of dead. The al-Shabab extremist group claimed responsibility. In a separate attack Saturday evening, a suicide bomber detonated an explosive at a tea shop in the Somali capital, Mogadishu, killing at least six people, police spokesman Sadiq Ali Adan told The Associated Press. Four other people were wounded. No one immediately claimed responsibility. Residents said the attacks at the army bases occurred in Bariirre and Awdhegleh villages of Lower Shabelle region, 75 kilometers (46 miles) south of Mogadishu. Speaking to the local media, Gen. Odawa Yusuf Ragheh, the commander of the Somali National Army, confirmed the twin attacks but said al-Shabab had been repulsed with “heavy losses” among the extremists. “They even left some of …