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MANHATTAN — New Yorkers across Upper Manhattan reported widespread power outages early Friday morning. Service seemed to return for most less than an hour later.

Multiple Con Edison customers reported losing power around 5:15 a.m., with the outages reaching from the East 60s on the Upper East Side and up into the Harlem area on Manhattan’s West Side.

Affected areas were the Upper West Side, Upper East Side, Morningside Heights, Hamilton Heights and Central Harlem.

“We are investigating a problem on our transmission system that caused three networks in Manhattan to lose their electric supply at about 5:13 a.m. this morning,” Con Ed said in a statement.

“The supply has been restored to those nteworks on the Upper West Side, Harlem and the Upper East Side,” the utility company said.

Videos from PIX11’s James Ford in Harlem showed blocks of almost total darkness in the Harlem area during the outages.

Video from PIX11 digital producer Kristine Garcia, shot near East 72nd and Third Avenue, showed much of the Upper East Side in the dark during the short-lived blackout.

Con Ed’s outage map jumped from just 67 customers in Manhattan without power at 5 a.m. to nearly 70,000 at around 5:45 a.m.

Then, around 5:45 a.m., many residents in the effected areas reported their power coming back on.

By 6:30 a.m., the number of Manhattan Con Ed customers affected by outages had dropped significantly to 551.

The outages resulted in delays across multiple Manhattan subway lines, according to the MTA.

No. 1, 2 and 3 trains have resumed regular service but with “significant delays,” while customers were advised to expect longer waits for the A, C and E trains in both directions.

N, Q and R train lines were also delayed in both directions due to the widespread loss of power.

The cause of the sudden outages is not known at this time.