Fulton County has finally certified its election results from the July 31 primary, but it still missed the state’s deadline to avoid potential fines.

“It’s certainly troubling to us. We have deadlines for the count to be completed,” said Georgia Secretary of State Brian Kemp, who is launching an investigation into the delay.

Fulton was the last county in Georgia to declare its results official, almost a week after voters went to the polls.

Fulton election officials were still counting votes this past weekend and were slow to input some of the early ballots.

The state says they reached out to the county several times, but never heard back from anyone.

“We don’t know exactly what the problem is. That’s one of the frustrating things for me. It would be nice if we did know. We don’t, but we’re going to find out,” Kemp told Channel 2 Action News.

Kemp says he has a launched a formal investigation into the delay. He sent investigators in last week to monitor the vote counting process.

Fulton is holding a recount of the primary for sheriff between Richard Lankford and incumbent Ted Jackson. The recount is supposed to last until Wednesday. Jackson won the race, but barley got more than the 50 percent needed to avoid a runoff with Lankford.

Fulton County can expect to be called before the State Board of Elections to try to explain what went wrong.

“We are confident that the outcome of these elections were not affected by a clerical error,” said Lee Parks, the attorney for the Fulton County Board of Elections.

It is not known how much the county could face in fines.