District of Columbia elections officials say some problems with electronic voting machines have led to a delay in reporting results from the city's Democratic mayoral primary.
A spokeswoman for the D.C. Board of Elections says results reported shortly before midnight Tuesday were almost entirely from paper ballots that were run through a scanner.
Spokeswoman Tamara Robinson says a handful of electronic machines were not shut down properly, and that's led officials to take a second look at electronic results to ensure they are being counted properly.
Polls closed at 8 p.m., and shortly before midnight, officials were reporting paper ballot results from 81 percent of the city's precincts. Those returns showed Mayor Vincent Gray trailing D.C. Councilmember Muriel Bowser by 10 percentage points.