WINONA, Minn. -- Winona County and state investigators are following leads to find out how a baby ended up in the Mississippi River.

The body of the newborn baby girl was found in a bag floating on the river at around 2:00 p.m. Monday about six miles south of Winona.

Authorities say the girl was born in the last few days. Winona County Sheriff Dave Brand tells News 8 while autopsy results may not be available for several weeks, there was no visible signs of trauma to the body.

Brand's department has four investigators working on the case, along with investigators from the Minnesota Bureau of Criminal Apprehension.

Brand says anyone with information should call his department at 507-457-6368, or Winona Area Crime Stoppers at 507-457-6530.

Brand says investigators are specifically looking for anyone who knows someone who recently gave birth, but whose baby has not been seen.

This is now the fourth time since 1999 that a baby has been found dead along that stretch of the Mississippi River. The other cases were all farther north near Red Wing in Goodhue County.

Brand says investigators have reached out to investigators in Goodhue County, but did not say whether they believe there is any connection between these cases.

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WINONA, Minn. -- The search is underway for whoever dumped a newborn baby girl into the Mississippi River.

The dead infant was found around 2 p.m. on Monday about six miles south of Winona.

Sheriff Dave Brand says a family boating on the river spotted a bag floating in the water. When they went to check it out, they found the baby inside.

Authorities say she was born in the last couple days. Now, they are trying to track down the child's parents.

"From my heart, I'd like to see whoever the mother is or the parents are to come forward and talk to law enforcement so we can have this infant properly buried in a good place," said Brand.

"Being a parent, this is a situation where it is pretty heart-wrenching," said Winona County Attorney Karin Sonneman.

"If you're out there and you know something about this, we'd really appreciate a call," she added.

This is now the fourth time since 1999 that a baby has been found dead along that stretch of the Mississippi River. The other cases were all farther north near Red Wing in Goodhue County.

Winona County officials say they have reached out to investigators in Goodhue County, but did not say whether they believe there is any connection between these cases.

An autopsy on the baby was being done on Tuesday. The results, however, are not expected back for several weeks.

The Minnesota Bureau of Criminal Apprehension and the Winona County Attorney's Office are assisting in the investigation.