Five soldiers were killed and 20 others injured in two explosions at military barracks in Yemen's Aden city, security officials said on Sunday.The explosions in Aden, which is a provisional capital for the government of Yemeni President Abd Rabbuh Mansour Hadi, took place accidentally, the officials told Efe news.The soldiers were moving ammunition to two vehicles in order to send it to the front when the explosions occurred.