The Minnesota Department of Transportation says a large hatch of mayflies caused a crash on a bridge in Hastings.
According to officials, a film of dead insects created a slippery surface on Highway 61 that caused a driver to lose control and collide with an oncoming vehicle shortly before midnight on Sunday.
One of the drivers involved in the crash spoke with FOX 9 News. He said he was driving with his two boys when a downpour of mayflies rained down on their vehicle just before crash.
No one was seriously injured in the crash.
A spokesman for MnDOT said the layer of dead mayflies was 2 to 3 inches thick on top of the roadway.
The bridge was closed for about an hour after the crash as crews brought in a plow to remove the insects. Sand was also poured on the area to help with traction.
The bugs, which are attracted to light and therefore prone to being struck by drivers at night, hatch in water during the summer. Typically, the city of Hastings turns off street lights on the bridge to avoid large swarms.