Two men jumped to their deaths from the George Washington Bridge just moments apart Wednesday afternoon – including one believed to have been saved by a Port Authority cop during another attempt just last month, sources said.

The twin tragedies took place within seconds of each other, with one of the victims leaping from the upper level while the other took the plunge from the lower level, Port Authority Police spokesman Joe Pentangelo said.

“They were both literally within seconds of each other,” Pentangelo said. “They were unrelated apparently.”

The man on the upper deck rode a bicycle onto the bridge and jumped about 4 p.m. from midspan, sources said, while the other man drove a Toyota Sienna minivan onto the bridge and leapt from a section closer to the New Jersey side of the span.

Both men were in Manhattan-bound lanes when they jumped only about 75 yards from one another, sources said.

Both bodies were recovered from the frigid Hudson River below and taken to the Manhattan side of the bridge.

They also left suicide notes, though their contents were not immediately revealed, sources said.

Sources said the man who drove onto the bridge is believed to have been the same man who tried to jump to his death on Feb. 17 – but was saved by a quick-thinking cop.

That man had gone back to reclaim his car on Tuesday, and the car is believed to be the same Toyota that was found on the bridge today, sources said.

In the earlier case, PA Police Officer Jesse Turano was dangling over the edge of the span to keep a 37-year-old man from jumping into the frigid Hudson River.

“I wasn’t going to let him go — I wasn’t going to let him die while I was out there,” he told The Post at the time.

Turano, a nine-year veteran, began working at the GW Bridge in 2010 and since then has prevented at least 12 suicides.

He and a partner that day spotted an abandoned 2011 Toyota, but couldn’t find the driver — until they heard him screaming into his phone.

The cop said he grabbed the man by the back of his jacket when he paused to look at his phone while his partner Brendan Mulderrig grabbed the man’s leg.

The pair wrestled the man to safety so he could be taken to Englewood Hospital for treatment.