Merrit Kennedy

Updated at 4:30 a.m. ET Thursday

British authorities have made eight arrests in their investigation into Wednesday's attack in London, police said Thursday morning.

Mark Rowley, the national lead for counterterrorism policing, told reporters that there were four dead, including the attacker, and 29 people have been treated in hospitals. Seven people are in critical condition, he said.

Police had earlier said there were five dead including the attacker.

Before Dyann Roof shot dead nine parishioners at a historically black church in Charleston, S.C., in 2015, he told his friend Joey Meek about his murderous plans during an alcohol and cocaine-fueled night.

Meek, 22, was sentenced Tuesday to 27 months in federal prison for concealing knowledge of a felony and then making false statements to the FBI.

A green sea turtle in Thailand that drew international sympathy when it emerged that she had consumed nearly 1,000 coins thrown into her pool has died.

The turtle nicknamed Omsin, the Thai word for "piggy bank," had an hours-long emergency surgery to remove the coins earlier this month. But she never woke up from a second emergency surgery.

A tree crashed onto a group of people enjoying a swim at the base of a large waterfall in Ghana, and local authorities tell wire services that at least 17 people were killed in the freak accident.

The revelers got caught in a rainstorm on Sunday, according to a statement from the Minister of Tourism. She added that "many" were killed and injured, and that they were mostly student groups visiting the area.

Quarterback Tom Brady led the New England Patriots to one of the greatest comebacks in football history at the Super Bowl this year. Immediately afterward, his game-winning jersey was stolen from the Patriots' locker room in Houston.

Now, police say it has been recovered in Mexico. The NFL stated that it was found "in the possession of a credentialed member of the international media."

A man entered the National Gallery in London on Saturday afternoon, approached a painting by British master Thomas Gainsborough, and proceeded to attack it with a "sharp object."

A Metropolitan Police Service spokesman tells NPR that a 63-year-old man named Keith Gregory, "of no fixed abode," was charged with causing criminal damage to a National Gallery painting.

The head of the House Intelligence Committee, Rep. Devin Nunes, R-Calif., said that there is still no evidence that the Obama administration wiretapped Trump Tower, as President Trump has claimed, even after the Department of Justice provided to the committee documents related to the allegation on Friday.

In 2016, a mass bleaching event caused unprecedented destruction to the Great Barrier Reef and other coral reefs around the world.

Now, a new study in Nature has concluded that securing a future for coral reefs "ultimately requires urgent and rapid action to reduce global warming."

It finds that local measures, such as protecting reefs and water quality, ultimately yield little protection against bleaching caused by higher water temperatures.

This frog really lights up a room.

The South American polka dot tree frog initially appears unremarkable. But researchers in Argentina recently got a huge surprise when they shone an ultraviolet light on it, revealing that the creature is actually fluorescent and glows bright blue-green.

Updated at 2:40 p.m. ET

The Justice Department has announced charges against four people, including two Russian security officials, over cybercrimes linked to a massive hack of millions of Yahoo user accounts.

The top U.S. Marine vowed in a Senate hearing to hold members of the Marine Corps accountable for sharing nude photos of female Marines online. But many members of the Senate Armed Services Committee responded with tough questions Tuesday, asking why more isn't being done to protect female service members.

Scientists have caught sight of a star extremely close to what they think is a black hole, whizzing around it at an extraordinary speed — at least twice an hour. As NASA put it, "This may be the tightest orbital dance ever witnessed for a likely black hole and a companion star."

The pair is in our galaxy, in an area dense with stars some 14,800 light-years from Earth.

Joni Sledge of the group Sister Sledge, best known for the iconic disco 1979 anthem We Are Family, has died at 60.

The group's publicist, Biff Warren, said Sledge was found at home in Arizona and they have yet to determine a cause of death. She had not been ill, he said.

An iconic Maltese natural rock arch collapsed into the sea Wednesday during a powerful storm.

The "Azure Window" jutting off Malta's Gozo Island is printed on innumerable Instagram posts and travel brochures. It was also featured in movies and TV shows, including HBO's Game of Thrones.

Lynne Stewart, a leftist lawyer who defended radicals and was eventually convicted in a terrorism case herself, has died at 77.

Her son Geoffrey Stewart told NPR that Stewart died Tuesday. She was released from prison in 2014 because she suffered from terminal cancer.

Stewart, who defended Black Panthers and Weather Underground members over the course of her career and considered herself a "people's lawyer," is perhaps best known for representing Egyptian cleric Omar Abdel Rahman in his trial over plotting to attack New York City landmarks.

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