The national power blackout on Thursday was cause by a lightning bolt at Nalubale hydro power power dam in in Jinja.
The lightning according to sources hit installations at Nalubale switch yard leading to a tripping in generation at all the three hydro power stations Kiira, Bujagali and Nalubale.
The power blackout plunged most of the country into darkness leading to what many have now dubbed as national power blackout.
The power blackout happened few hours after the end of the Nile Basin Heads of States Summit hosted by President Museveni at State House in Entebbe.
Several international guests were also arriving into the country ahead of the Refugee solidarity summit.
Uganda power distributor Umeme Limited attributed the blackout to a technical problem affecting generation.
Uganda Electricity Generation Company Limited did not explain the cause of the glitch. Most of the officials from Uganda Electricity Generation Company Limited had reportedly traveled to inspect the progress of works at Isimba dam at the time of the power blackout.
Some technical persons had questioned why a technical glitch at one of the stations would have caused generation failure at other stations.
Uganda Electricity Generation Company Communications officer, Simon Kasyate confirmed that Nalubale was hit by lightning.