VANCOUVER -- B.C. Hydro says it suspects a lightning strike has caused widespread outages in northern and central British Columbia.

The outages began Wednesday at about 9:30 p.m. with more than 120,000 people left in the dark.

B.C. Hydro initially said the outages were caused by a transmission failure.

The utility company says power is expected to be restored to most customers by 12:30 a.m.

Communities including Vanderhoof, Smithers, Fort St. John, Dawson Creek, Chetwynd, Hudsons Hope, Houston and Burns Lake are without power, but it was restored to Prince George by 10:15 p.m.

B.C. Hydro says crews are investigating and working in affected communities.