Wisconsin State Patrol Sergeant Nathan Henriksen told NBC15 one body has been recovered after a semi-truck went off a bridge into Mirror Lake near Wisconsin Dells. The second person in the truck is still presumed to be missing.

The Wisconsin State Patrol said recovery efforts have stopped Sunday evening because of visibility and weather issues. Efforts will start again Monday morning.

Eastbound lanes on Interstate 90/94 from exits 89 to 92 reopened Sunday night.

Both lanes of the interstate were closed around 12:30 p.m. on Sunday in order to pull the semi out of the water. The alternate route was STH 23 (exit 89), to US Highway 12, back onto Interstate 90/94.

An official with the Lake Delton Police Department tells NBC15 that two people were in a semi-truck. The truck damaged a guardrail at mile marker 91 going eastbound at 7:32 a.m., according to Wisconsin State Patrol.

Upon further investigation, the wheel tracks followed directly off the right ditch cliff into Mirror Lake where a tractor trailer unit came to rest, completely submerged.

A driver on the highway noticed a hole in a guard rail and when they went to investigate, saw the semi in the water.

The cause of the crash is still unknown. Henriksen said weather could be a factor, but law enforcement is still investigating.

"It's not to say that something happens, you know, there was a medical issue or another factor that caused the driver to not be able to maintain control, but again when it's snowing out like this, we ask that people do slow down so that they can travel safely and get to where they're going safely," he said.

Officials with the Department of Natural Resources are also on scene to handle a diesel spill caused by the crash, according to the Wisconsin State Patrol.

Some diesel fuel has spilled into Mirror Lake, but the department is still investigating the extent of the spill.