Nigeria, April 15 -- The Transmission Company of Nigeria (TCN) says it has fully restored the collapsed national electricity grid.

The TCN General Manager, Public Affairs, Ndidi Mbah, disclosed this in a statement Monday afternoon.

Earlier on Monday, Nigeria's electricity grid collapsed yet again, throwing several cities into darkness.

The grid collapsed as generation dropped to 64.70 megawatts, officials said.

The latest collapse occurred less than a month after the national grid system collapsed in March.

TCN, in its statement, said the collapse of the national grid on Monday morning was caused by a fire incident at the Afam power generating station, leading to a sudden generation loss of 25 MW and 305 MW, respectively.

"The Trans...