After missing a court-ordered deadline for the publication of Hillary Clinton's private emails, the State Department quietly upped the number of classified records it posted online early Friday morning.

State Department spokesman John Kirby had told reporters Thursday afternoon to expect 45 classified emails in a document dump of 2,900 pages planned for later that same evening.

However, the agency was unable to publish the emails when expected and delayed posting the records online until 1 a.m. Friday.

A State Department official said Friday morning the actual number of classified emails contained within the records released had climbed to 66.

The official attributed the spike to the fact that the agency added more pages to the batch later in the evening, bringing the total number of pages published this week to 3,007.

The official did not provide a specific reason for the delay Thursday evening or the addition of the extra pages.

"Due to the large number of documents involved, the quick turn around from last week's production, we were delayed from our original posting time frame last night," the official said.