A house exploded in Tracy, about 150 miles southwest of the Twin Cities, on Saturday morning, injuring three girls and their mother. All four were hospitalized. The house was fully ablaze when firefighters arrived. Witnesses said the explosion blew the chimney off the roof and glass from the home's front windows shot all the way across the street, the Marshall Independent reports. The cause was not immediately known.

Four children were injured in a campfire explosion Friday night at the Money Creek Haven Campground in Houston. Authorities said the accident was caused by an adult who poured an accelerant on a smoldering campfire. A 4-year-old girl was airlifted to Regions Hospital in St. Paul, while the other three -- one by air -- were taken to a La Crosse, Wis., hospital.

Minnesotans continue to cross the border to buy aerial fireworks in Wisconsin. KARE 11 reports nearly 70 percent of the customers who shop at Venture Fireworks in Hudson are from Minnesota. Gov. Mark Dayton vetoed a bill that would have expanded the sale of fireworks in the state.

The duck and goose hunting season is underway in Minnesota. Opening weekend seemed to be generally successful, apart from an accident on the Iron Range that left an Eveleth teenager injured. Last year 89,000 hunters took to the state's lakes and wetlands in search of waterfowl.

Two young girls seriously burned in a campfire explosion at a campground near the southeastern Minnesota town of Houston last month are on the mend. Chloe Langen, 4, has been upgraded from critical to serious condition at Regions Hospital in St. Paul, and Annabelle Heyer, 4, is in fair condition at University Hospital's burn center in Madison, Wis.

A neighbor rushed to the aid of a family whose house exploded in Tracy over the weekend, charging into the burning home to save a baby. The mother and three daughters who lived there were badly injured. Neighbors said the woman told them she had lit a cigarette prior to the blast.

Fond du Lac County authorities in Wisconsin have detained a 16-year-old boy who they say shot an arrow that was aimed at a squirrel but struck and injured a 7-year-old girl in Campbellsport on May 20. The teen initially mislead investigators, fearing consequences, police said.