Here is the latest Iowa news from The Associated Press at 3:40 a.m. CDT

CRESTON, Iowa (AP) — Authorities in Mexico say they found no signs of violence when they discovered the bodies of an Iowa couple and their two children in a condo in the Yucatan Peninsula. The Quintana Roo state prosecutor’s office tweeted Friday that four bodies had been found in a tourist compound in Tulum. The office said “no signs of violence were found on the bodies or in the room.” Authorities in Iowa say the family was reported missing by relatives early Friday, about a week after leaving for Mexico.

DAVENPORT, Iowa (AP) — A Davenport man has been sentenced to up to 55 years in prison for the 2017 shooting death of another man in the front yard of a home. The Quad-City Times reports that 28-year-old David Levy Jr. was sentenced Friday. A jury had found Levy guilty in February of second-degree murder and a firearm count for the death of 33-year-old Lasabian Walker.

KINGSLEY, Iowa (AP) — A propane explosion has injured two people in northwestern Iowa and destroyed four rural buildings. Kingsley Fire Chief Paul Huth tells the Sioux City Journal that crews were called to the explosion at a hog farm near Kingsley before 7 a.m. Friday. Huth says the explosion happened when two men walked into a hog nursery building on the property. Huth says a propane leak inside the building likely touched-off the explosion and resulting fire when door was opened, kicking on an automatic heater.

DES MOINES, Iowa (AP) — From hog producers in Iowa to apple growers in Washington state and winemakers in California, farmers are expressing deep disappointment over being put in the middle of a potential trade war with China by the president many of them helped elect. After President Donald Trump announced plans to impose tariffs on products including Chinese steel, China responded Friday with a threat to slap tariffs on a variety of U.S. products, including pork, wine, apples, ethanol and stainless-steel pipe.