DES MOINES, Iowa (AP) — A new mobile app was supposed to help Democratic officials quickly gather information from some 1,700 caucus sites throughout Iowa. Instead, a "coding issue" within the app is being blamed for delays that left the results unknown the morning after the first-in-the nation presidential nominating contest.

Glitches with a new mobile app Monday caused confusion, and some caucus organizers were forced to call in results for the state party to record manually, introducing delays and the possibility of human error. Iowa Democratic Party Chairman Troy Price said the delays were not the result of a breach and party systems were secure.

"While the app was recording data accurately, it was reporting out only partial data. We have determined that this was due to a coding issue in the reporting system," Price said in a statement Tuesday, adding the issue has since been fixed. "The application's reporting issue did not impact the ability of precinct chairs to report data accurately.

The party said it expects to release unofficial results later Tuesday after manually verifying its data against paper backups. Unlike the November election and state primaries administered by state and local election officials, the Iowa caucus was administered by the Iowa Democratic Party. Nevada Democrats also have plans to use a mobile reporting app for their caucuses set for Feb. 22.

Homeland Security Secretary Chad Wolf told Fox News on Tuesday that there was no indication of "any malicious cyberactivity." He added that Iowa Democrats declined his department's offer to test the reporting app. That's not unusual, as outside security firms do similar testing. The state party had said previously they had worked closely with security experts to test the app.