PIGEON FORGE, Tenn. (AP) — A preliminary report on a helicopter crash that killed the pilot and four people sightseeing near the Great Smoky Mountains National Park has found indications the tail rotor may not have had power when it hit trees on the top of a ridge.

The report from the National Transportation Safety Board released Monday lists some of the initial findings of the investigation without speculating on the cause of last week’s crash.

The report found the Bell 206 had plenty of fuel and the weather was clear. The helicopter was current on inspections and had already gone on several flights that morning.

Another helicopter pilot in the area reported hearing no distress call, but an on-the-ground witness told investigators the helicopter “didn’t sound right” before the crash.

LINCOLN, Neb. (AP) — Advocates of a medical marijuana bill that was rejected by Nebraska lawmakers have united behind an effort to place the issue on the November general election ballot, but group leaders say they might not be able to rally enough support before the July 1 deadline.

Bryan Boganowski of the Omaha chapter of the National Organization for the Reform of Marijuana Laws says a successful ballot measure this late in the process would cost about $800,000.

Shelley Gillen, president of of Nebraska Families 4 Medical Cannabis, says unless a private donor comes forward, the group will wait until the following year to submit a petition.

Medical marijuana has been opposed by Gov. Pete Ricketts, Attorney General Doug Peterson, the Department of Health and Human Services and law enforcement groups.

OMAHA, Neb. (AP) — Two-day symposiums on disaster preparedness and biocontainment unit training have been scheduled at four locations around Nebraska.

The symposium topics will include climate change and infectious diseases; nightclub fire response; drones; social media in disasters; long-term care evacuation; and public health and Ebola.

Registration is required. The symposiums cost $45. Biocontainment unit training is free. Register at https://www.preped.org/events/ or call 402-552-2529 or email center@preped.org.

The first event is set for Tuesday and Wednesday in Gering at the Gering Civic Center. The second is scheduled May 3-4 at the Holiday inn Convention Center in Kearney. The third is set for May 24-25 at the Divots Conference Center in Norfolk, and the last is scheduled for June 14-15 at the Scott Conference Center in Omaha.

THEDFORD, Neb. (AP) — A mild earthquake has jostled northern Nebraska.

The U.S. Geological Survey says the quake registered 3.2 in magnitude and occurred at 12:07 a.m. Monday. It occurred about three miles deep at a spot around 23 miles north-northeast of Thedford.

Sheriff department dispatchers in Cherry and Thomas counties say they haven’t gotten any calls about injuries or damage.