The general manager of the southern refineries company said the plant stopped completely on Sunday while an official at the Persian Gulf port of Mina al Bakr said loadings of vital oil exports halted Monday, according to Reuters. The Basra refinery manager, Thair Ibrahim told Reuters that there was no timetable for a restart of the 140,000-barrels-per-day plant, a key supplier of gasoline to the war-torn country. "It's zero. We don't have any electricity since yesterday night," Ibrahim said. "The generators are not working. We are planning to install a new turbine but this could take until the end of September," he said. Violence erupted in Basra over the weekend as hundreds of stone-throwing Iraqis rampaged against fuel and power shortages. The refinery shutdown will deepen petrol shortages, already severe due a halt in unloading gasoline imports at the port of Umm Qasr. These were stopped about a month ago after the Unorthodox style of transferring the fuel directly from ships to road trucks led to one truck catching fire. Four tankers were last heard waiting to offload outside the port. Ibrahim said the refinery depended for power on one rickety gas turbine which has already failed three times this month. "For a month, we have been depending on one gas turbine which has many problems. It works for two to three days and then we are forced to shut down," he said. Loadings at the Mina al-Bakr Port have also been interrupted by erratic electricity supply which has cast doubt on Iraq's ability to achieve its export target of 645,000 bpd from southern oilfields. "All the loading has stopped, there is a power failure at the pumping station. There are two tankers alongside the port," the port official said. He said so far only one August loading very large crude carrier -- the Phoenix Voyager I, chartered by Chevrontexaco -- has left the port. The two tankers that are alongside are the Kirakatingo, chartered by Shell and the Golden Victory, booked by Conocophillips, which should have completed loading over the weekend.