The vote for the U.S. president remains extremely close and Pennsylvania is one of the states that remains undecided.
Early Friday, USPS said 1,076 ballots, had been found at the USPS Philadelphia Processing and Distribution Center. About 300 were found at the Pittsburgh processing center, 266 at a Lehigh Valley facility and others found at other Pennsylvania processing centers.
The U.S. Postal Service (USPS) said about 1,700 ballots had been identified in Pennsylvania at processing facilities during two sweeps Thursday and were being delivered to election officials.
About 500 ballots were also discovered in North Carolina during sweeps, USPS said on Friday.
U.S. District Judge Emmet Sullivan on Thursday had ordered twice daily sweeps at USPS facilities serving states with extended ballot receipt deadlines as votes were still being counted in U.S. election battleground states.