Defense Secretary Jim Mattis answers a question about the ambush of U.S. troops in Niger. Photo: Alex Brandon / AP

The FBI is assisting in investigating the ambush in Niger more than two weeks ago that left four U.S. soldiers dead; specifically, the Islamist militants believed to be responsible for the attack, and how they learned of the U.S.-Niger patrol, according to the Wall Street Journal.

What happened: The WSJ reports that the American team was on a routine patrol with Nigerian soldiers, when they "gave chase to a small group of men on motorcycles" heading towards Mali's border. The group was a decoy; when the joint patrol returned, they were ambushed by "several technical vehicles and dozens more armed men on motorcycles."

Go deeper: What happened during this month's Niger attack..

Go deeper

Updated 10 mins ago - World

Massive explosion rocks Beirut

Photo: Anwar Amro/AFP via Getty Images

A major explosion has slammed central Beirut, Lebanon, damaging buildings as far as several miles away and injuring scores of people.

Driving the news: The cause of the explosion is unknown. It's also unclear how many people were killed or wounded, but the Lebanese Red Cross has told AP that casualties number in the hundreds. Reuters reports that at least 10 people have been killed, citing security sources.

Updated 46 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 1 p.m. ET: 18,349,260 — Total deaths: 695,550 — Total recoveries — 10,951,112Map.
  2. U.S.: Total confirmed cases as of 1 p.m. ET: 4,732,418 — Total deaths: 155,942 — Total recoveries: 1,513,446 — Total tests: 57,543,852Map.
  3. States: New York City health commissioner resigns in protest of De Blasio's coronavirus response.
  4. Public health: 40% of Americans continue to put off medical care.
  5. Politics: Trump tells "Axios on HBO" that pandemic is "under control," despite surges in infections and uptick in deaths.
  6. Business: Low-income households are struggling to pay energy bills — Construction spending falls for 4th straight month.
Updated 54 mins ago - Science

The U.S. is at risk of attacks in space

Illustration: Annelise Capossela/Axios

Other nations are catching up to U.S. capabilities in space, potentially putting American assets in orbit at risk.

Why it matters: From GPS to imagery satellites and others that can peer through clouds, space data is integral to American national security.