• Uber driver's routes may be linked to Michigan killing spree
  • Violence in India threatens New Delhi's water supplies

Here are highlights of the top breaking stories from around the world on Sunday:

Boris Johnson, arguably the second-most important politician in the U.K. after Prime Minister David Cameron, said he’ll campaign against Cameron and for pulling Britain out of the European Union. His move further defined a hard split among Conservatives with the referendum on staying in the EU four months away. The pound opened with its biggest drop in more than a month.

Yahoo is ready to start approaching potential corporate and private-equity buyers for its core business. People familiar said first-round bids are at least a month away.

Republican Senators Ted Cruz and Marco Rubio, after finishing in a near-tie for second in Saturday’s South Carolina presidential primary, began positioning themselves as the only candidate capable of stopping Donald Trump’s march to the nomination.

New Delhi is in danger of running out of water after protesters shut off a canal in continuing violent unrest over caste rights.

A man accused of a killing spree in Michigan Saturday night may have picked out his victims based on where he was going as an Uber driver. Uber says the driver, who had no criminal record, passed a background check. It’s not the first time the ride-sharing service has been linked to a criminal case, though never before a mass shooting.

Nigeria is going along with Saudi Arabia and Russia on the concept of a freeze in oil production levels -- sort of.

Oops ... A U.S. government agency made a basic math error in a report knocking down allegations that Lumber Liquidators sold flooring with dangerously high levels of formaldehyde. The measurements should have been three times higher than the U.S. Centers for Disease Control said, meaning the cancer risk was also significantly understated. The company’s shares got a bump when the original report came out Feb. 10.

Apple’s new outside lawyer, former U.S. Solicitor General Ted Olson, made his first comments about the case since being hired.

It turns out that the U.S. and North Korea were discussing the possibility of a peace treaty to officially end the Korean War 63 years after the shooting stopped -- until the North did that missile launch.

The U.S. and Russia have another understanding about a potential truce in Syria, even as Islamic State suicide bombers killed 140 people in attacks Sunday.

The new measure of real estate inflation in Hong Kong: a luxury home sold for $107 million in just five hours this weekend.

Samsung introduced its new Galaxy S7 smartphones, trying to wrest market share back from the IPhone. 

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