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Police say 21-year-old Dylann Roof opened fire and killed nine people during a Wednesday prayer meeting at one of the city's oldest historically black churches.

Police are still searching for a suspect in the attack, described as a young white man. Charleston police chief Gregory Mullen says the shooting will be investigated as a hate crime.

CNN and other news organizations report Williams will shift over to MSNBC, where he'll cover breaking news, while Lester Holt will remain as anchor of NBC Nightly News.

Nearly 4 million babies were born last year. Preliminary data from the CDC show that the U.S. birth rate increased last year for the first time since 2007.

In what researchers say is a first, they've discovered the neuron in worms that detects Earth's magnetic field. They say the worms have microscopic antenna-shaped sensors to help orient themselves.

Prosecutors say Fareed Mumuni, 21, was part of a plot to support ISIS. A criminal complaint also alleges he used a kitchen knife to try to stab an FBI agent who came to his Staten Island home.

A number of conservative politicians have cast a dim eye on Pope Francis' statements on climate change. A teaching document coming out Thursday aims to make the environment a moral imperative.

An Uber driver in San Francisco will be paid more than $4,000 in expenses.

Federal Reserve policymakers said Wednesday they will continue to tamp down interest rates. The last time they raised interest rates was June 2006. They set no specific deadline for raising rates.

New data suggest that many regions in the world are overusing their underground water supplies. And researchers aren't sure how much remains.