An explosion occurred in a vehicle parked in an empty street of Nashville of the United States’ Tennessee state on Friday morning. Though no deaths were reported, the explosion left three injured. Calling the explosion a significant one, Nashville Police spokesperson Don Aaron said that it seems to be an intentional act. The explosion was felt nine blocks away and several vehicles caught fire. It even knocked one officer off his feet, with hopefully only causing temporary hearing loss, he said.

According to a report in AP, the explosion resulted in communications outages, including the police emergency systems. It also impacted holiday travel at the airport of the city.

The vehicle blared a recorded warning that an explosion would happen in 15 minutes, Metro Nashville Police Chief John Drake informed AP. The local police quickly came into action and called the bomb squad. Soon after the nearby buildings were evacuated, the blast took place.

Several Twitter users shared the video that captured the warning issued from the vehicle a few seconds before the explosion. The message said, “…if you can hear this message, evacuate now,”

A curfew order has been issued by the Mayor. “This morning’s attack on our community was intended to create chaos and fear in this season of peace and hope,” Mayor John Cooper said at a news conference.

“But Nashvillians have proven time and time again that the spirit of our city cannot be broken,” he added.