A major disruption in power transmission lines plunged a vast area of Mirpur into darkness this evening.

According to sources at Power Grid Company of Bangladesh (PGCB) and Dhaka Electric Supply Company (Desco), a 132 kV transmission line between Uttara to Mirpur tripped at 7:30pm leading to a blackout for more than an hour.

There was no power supply in Mirpur section 2, 6, 10, and adjoining areas following the disruption.

"A sudden blast in a potential transformer (PT) in the grid line led to the breakdown of the power supply system," a senior PGCB official told UNB.

He, however, said that the power supply was restored in some of the areas within half an hour through an alternative transmission line from Amin Bazar grid substation.

"We're now trying to restore power supply to remaining areas," he noted at 8:30 pm.

Desco Managing Director Kausar Ameer Ali said he hoped that they would be able to restore power supply to other areas soon.