MINNEAPOLIS (AP) - Thousands of Prince fans are asking federal authorities to open a grand jury investigation into the rock star's death. The petition to the U.S. Attorney's Office has been signed by more than 6,000 people. Petition organizer Nicole Welage tells the Star Tribune that more answers are needed about Prince's accidental fentanyl overdose in 2016, and that the supplier must be held accountable. Prosecutors have said there is no credible evidence that will lead to federal criminal charges.

BEMIDJI, Minn. (AP) - Protesters have conducted a water ceremony and blocked a bridge near Enbridge Energy's planned Line 3 replacement pipeline in northern Minnesota. Demonstrators also raised a tepee on the bridge south of Bemidji. There were no arrests. The protest briefly halted road construction on the bridge in Clearwater County. Native American and environmental activists contend the new line risks spills in fragile areas.

CLAREMONT, Minn. (AP) - Authorities say a 24-year-old Minnesota man was putting away his cellphone when he crashed into a car stopped on a highway, killing a woman and her 8-year-old daughter. Forty-three-year-old Rachel Harberts of Dodge Center was stopped on Highway 14 in Claremont on Sept. 7 when her car was struck from the rear by a Hummer. Harberts died Saturday at a Rochester hospital. Her daughter, Emerson Harberts, died in the crash, and her 12-year-old son was seriously injured. The other driver was not hurt.

ROCHESTER, Minn. (AP) - Mayo Clinic is expanding its Gonda Building in downtown Rochester, Minnesota. The clinic plans to add 11 floors to the 21-floor building, including an expansion of clinical space and a hotel. Four of the floors will be dedicated to new clinical space at a cost of $190 million to Mayo. The seven-story hotel will be developed by Singapore-based Pontiac Land Group. The project is expected to be finished by the end of 2022.

Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.