OMAHA, Neb. (AP) — City officials are working on a busy intersection in downtown Omaha affected by a sinkhole and water main break.

The Metropolitan Utilities District says an independent contractor hit a 12-inch water main early Monday morning, causing water to travel several blocks around 20th and Farnam Streets.

The utility crew had been working in the area to repair a sinkhole that formed last week by a leaking pipe.

Workers were brought in to sweep off muddy waters. Lane restrictions are in place.

DENVER (AP) — Authorities say four students suffered burns and at least one had serious injuries from a fire in a Denver high school chemistry laboratory.

The fire broke out Monday at SMART Academy, a charter high school in southwestern Denver. Denver Fire Department spokesman Mark Watson says the cause was under investigation, but the fire appears to have been accidental.

Watson says at least some of the students had burns to their faces and upper chests.

He says the fire appeared to have burned itself out and didn’t spread beyond the lab.

The blaze set off school alarms, prompting an evacuation. Watson says students have returned to classes.

A school spokesman says a teacher was in the lab at the time. Firefighters received the alarm shortly before 8 a.m.

CEDAR RAPIDS, Iowa (AP) — The death of an Iowa teenager who was sucked into a storm drain during flash flooding this summer has focused attention on the dangers of the large flood-control pipes and culverts used all over the country.

People are caught in flood pipes a few times a year, typically after a heavy rainfall. They’re often carried toward creeks and lakes where the pipes empty.

That’s what happened to 17-year-old Logan Blake, who died after being swept into a culvert that didn’t have a grate while playing Frisbee with friends.

The National Institute for Occupational Safety and Health warned cities 12 years ago that installing grates could prevent such accidents. Some cities fear the grates will clog with debris during heavy rains, but supporters say clogging can be managed with routine checks.

GRAND ISLAND, Neb. (AP) — A Nebraska man charged in a drunken-driving crash that killed his fiancee has pleaded no contest.

30-year-old Johnny Alvarez entered the pleas on Wednesday. He was charged with felony motor vehicle homicide and driving under the influence. Both of the charges were reduced as part of the plea deal. He now faces up to 20 years in prison.

Alvarez was hospitalized for four months after the August 2013 crash that killed Jamie Lohman Sandate. He had two pervious DUI convictions and his blood alcohol content was nearly twice the legal limit at the time.

Authorities say he lost control of his car, hit an electrical pole and then drove into a tree. Sandate died at the scene.

FORT COLLINS, Colo. (AP) — Two boys missing in rugged forest north of Rocky Mountain National Park were found alive and well.

Larimer County officials say the boys, ages 11 and 12, were separated from their group while hunting small game. They did not require any medical attention when found Sunday and were being reunited with their hunting party from the local area.

The boys were armed with .22-caliber rifles and had backpacks with survival gear, water and food. Authorities were contacted Sunday morning.

Officials said family members assisted with the search.

Authorities said several agencies and an aircraft helped in the search for the boys.

LINCOLN, Neb. (AP) — A Nebraska businessman who built the regional grocery chain of B&R Stores has died at the age of 92.

Russ Raybould died Saturday, and his funeral will be held Wednesday morning at 10:30 at Blessed Sacrament Church in Lincoln.

The chain of 18 grocery stores in Nebraska and Iowa that Raybould built started 50 years ago with a single Russ’ Market store just south of downtown Lincoln.

The company owns Russ’ Market, Super Saver, Apple Market and Save Best Foods stores in seven cities.

Raybould established B&R Stores with Clayton Burnett, a fellow Safeway alum. He later bought out Burnett in 1974.

Kathy Siefken, executive director of the Nebraska Grocery Industry Association, says Raybould valued his employees and never forgot a name.

OMAHA, Neb. (AP) — Police are investigating a fatal shooting after finding a man’s body behind an apartment building in northeast Omaha.

Omaha police say gunshots were detected at 2:47 a.m. Sunday by the city’s ShotSpotter system.

Officers found a man’s body behind the Spencer Apartments just north of 28th and Spencer streets.

Police did not immediately release the victim’s name or many details about the shooting.

OMAHA, Neb. (AP) — One Omaha man died and another was injured when an SUV collided with a tow truck late Saturday.

Omaha police say alcohol was likely a factor in the crash that happened near 13th and Center streets shortly before midnight.

Police say 48-year-old Eric Hallett was driving north on 13th Street when he crossed the center line. Then his 1998 Dodge Durango collided with a 2005 Freightliner tow truck.

Hallett died at the scene of the crash.

Police say the tow truck driver, 43-year-old Dennis Logue, was treated for a broken leg after the crash.

MACEDONIA, Iowa (AP) — The pilot of a helicopter that crashed last week in western Iowa’s Pottawattamie County has died at the Omaha hospital where he was being treated.

Chris Moore was operating the crop-dusting helicopter over a bean field near Macedonia when it hit a power line on Sept. 6 and crashed, officials said.

Moore died Thursday, a Creighton University Medical Center.

Treynor Fire Chief Russ Maguire had said Moore was out of the wreckage and conscious when paramedics arrived following the crash. Authorities had said at the time that his injuries weren’t believed to have been life-threatening.

The details of Moore’s death on Thursday were not released.

OMAHA, Neb. (AP) — Police and firefighters in Omaha and surrounding areas will gather next week for an annual Mass to pray for safety of those while in the line of duty.

The Blue Mass will be held at 9:30 a.m. Thursday at St. Vincent De Paul Catholic Church in northwest Omaha.

The tradition allows officials, family and friends to pray for the safety of police and first responders and the individuals they serve. There will also be a traditional blessing of public safety equipment after the Mass.

The event is open to the public.