Tajikistan was hit by three-hour nationwide blackout last Friday.

The Tajik capital Dushanbe was plunged into darkness by a power failure Friday evening.  The electricity gave out at 6:30 pm and returned at 9:30 pm.

Barqi Tojik (Tajikistan’s national integrated power company) that operates the Nurek hydroelectric power plant (HPP) said there was an outage at the facility, which provides up to three-quarters of the country's power.

All regions of Tajikistan, except the Gorno Badakhshan Autonomous Region (GBAO), which is fed by the Pamir Energy Company, have been plunged it darkness by an unexpected electricity blackout only one day before the start of work on stemming the flow of the Vakhsh River for construction of the Roghun HPP dam. 

Russian state-run news agency Sputnik cited unnamed sources as saying the blackout affects 90 percent of the country and that there were two possible causes.

The first is that the authorities have reportedly decided to insure themselves during the stemming of the Vakhsh River, while they were carrying out explosions.

The second version is that there has been an accident on the LEP-500 power line, which provides electricity to most of the country, Sputnik reported.