A pickup truck went through a stop sign at a rural intersection northwest of Willmar, Minn., and struck a minivan, killing the couple in the other vehicle, authorities said Monday.

The crash occurred shortly after 9 p.m. Sunday at County Roads 1 and 27, about 4 miles north of Pennock, according to the Kandiyohi County Sheriff's Office.

Killed were Mildred Frank, 75, and David Frank, 76, the Sheriff's Office said. The Franks had been in the greenhouse business for several decades. The collision occurred as the Franks were less than 3 miles from their home on County Road 1.

The pickup's driver, Matthew Gingery 40, of Ozark, Mo., was treated for minor injuries that day and released.

Gingery is a storm chaser and onetime television meteorologist, who for many years has been tracking tornadoes and other violent weather from behind the wheel of his vehicle. His video recordings have appeared on the Weather Channel, CNN, CBS, NBC and FOX, according to his online professional bio.

It's not known if he was on a storm-chasing trip at the time of the accident.

The weather in the immediate Willmar area was calm at the time of the crash Sunday night, but storms were brewing about 50 miles to the north. Numerous messages were left Tuesday with Gingery seeking information about his travels Sunday in Minnesota.

According to the Sheriff's Office, Gingery was heading west on County Road 27 and did not obey a stop sign and broadsided the Franks' van, which was heading north on County Road 1. All three people were wearing seat belts, the Sheriff's Office said.

Chief Sheriff's Deputy Greg Stehn said his office is investigating what charges might be filed against Gingery.