NPR News

The U.S. Coast Guard has shut down a section of the Mississippi River south of Paducah, Kentucky after two tow boats collided, causing an oil spill of unknown size.

In a statement, the Coast Guard said that the collision occurred Wednesday evening at 8:22 p.m. at Mile Marker 937, just north of Columbus, Kentucky.

The number of confirmed cases of Legionnaires' disease at California's San Quentin prison is holding steady at six, one of three outbreaks of Legionnaires' around the country that have sickened dozens and killed 20.

Another 95 San Quentin inmates are under observation because of respiratory illness, state officials said, but they have not been diagnosed with Legionnaires' disease. The inmates are being treated at San Quentin's medical unit.

Among the kangaroos and kookaburras, another creature trundled through the Australian bush.

Hooves barely visible, eyes mostly covered, the animal was the size of a refrigerator, the color of dirty snow.

A concerned hiker spotted the furry specimen days ago and raised the alarm. It was a matter of life and death — and this sheep needed a haircut.

Updated at 2:20 p.m. ET following Trump's press conference

Donald Trump is "totally pledging" his allegiance to the GOP and promising not to mount a potentially damaging third-party bid for president.

The billionaire businessman said Thursday he had signed the Republican National Committee's "Loyalty Pledge," which says he will support the eventual nominee and not run as an independent or on another party line.

"I will be totally pledging my allegiance to the Republican Party and the conservative principles for which it stands," said Trump.

It was supposed to be a routine photo-op.

Pages