A government official in the area said rescue efforts are underway and were speeding up after two more excavators were provided on Friday bring the total to five. “So far, they have been able to dig about 15m deep… they are aiming at digging up to 35m,” Geita Regional Police Commander Mponjoli Mwabulambo said. “We hope the victims are still alive because the rescuers managed to push in pipes to supply oxygen underground,” he added...The trapped workers include 13 Tanzanians and a Chinese national.