Service on seven New York City subway lines returned to normal Friday night following a network communications problem during the busy evening commute.

The Metropolitan Transportation Authority says the outage affected the No. 1, 2, 3, 4, 5, 6 and S trains in both directions, which were suspended for over an hour.

At about 9:30 p.m., the MTA tweeted that all lines were running, and schedules were returning to normal. They still warned of longer wait times.

MTA President Andy Byford says just before 6 p.m. they received word from the rail control center that they lost computer indications to what controls the signaling system on the numbered lines and the Times Square shuttle. All trains had to stop where they were to find out what was going on.

The stoppage came as the city geared up for a scorching weekend.

MTA officials say they still don't know exactly how the issue occurred.

Multiple elected officials angrily reacted to the outage, including Mayor Bill de Blasio, who called it "UNACCEPTABLE."