The Pennsylvania 911 call system outage earlier this month was caused by a technical issue, not a cyberattack, according to a preliminary report. People calling 911 in Pennsylvania experienced intermittent disruptions on July 12.

A more detailed analysis is underway, the state said. Officials previously said they did not believe a cyberattack or software update was the culprit.

System issues were behind intermittent disruptions to Next-Generation 911 earlier this month, the Pennsylvania Emergency Management Agency said in a preliminary report. A cyber attack is not believed to be behind it.