The American embassy in the Gulf state of Qatar has confirmed in a statement on its website that a member of its security staff was injured in an assault.

It is unclear what prompted the incident, which happened on Thursday at the embassy in the capital, Doha.

The United States on Friday denounced the decision by Pakistani authorities to free the alleged mastermind of the 2008 Mumbai attacks, Zaki-ur-Rehman Lakhvi, on bail.

State Department spokesman Jeff Rathke said Washington was "gravely concerned" and had "communicated that concern to senior Pakistani officials over the course of many months and as recently as yesterday."

Defense Secretary Ashton Carter promised Friday that the U.S. would deploy state of the art weaponry in Asia, including the latest stealth bombers and cyber warfare units, to counter threats posed by the likes of North Korea.

"Our newest and best things are being deployed to this part of the world," Carter said in Seoul -- the second leg of a visit to the two key U.S. military allies in the region, Japan and South Korea.

Washington warned Thursday it would not stand by while Tehran supports Shiite rebels in Yemen, as Iran's supreme leader denounced Saudi-led air strikes in the country as "criminal acts".

In the most direct American criticism yet of Tehran's backing for the Shiite Huthi rebels, Secretary of State John Kerry said Washington would not accept foreign interference in Yemen.

From the White House to local communities, Americans are pushing for more police to wear body cameras after an officer shot dead an unarmed man running away from a traffic infraction.

The killing of Walter Scott, a 50-year-old black man, shot in the back by a white officer on Saturday in South Carolina and filmed on a cell phone, shocked America and shocked the world.

The U.S. military is in danger of losing its technological advantage unless it invests in research and finds ways to build innovative weapons much faster, top officials said Thursday.

The Pentagon unveiled an initiative to streamline its bureaucracy and tap into technological breakthroughs in the private sector amid growing anxiety that American forces' longtime hi-tech edge is slipping away.

A senior government official who caused a national uproar after he used one of his agency's helicopters to take his family to the airport in scandal-plagued Mexico, announced his resignation Thursday.

David Korenfeld, the director of the National Water Commission (Conagua), apologized and resigned following demands from opposition groups, journalists and Internet users who have called for his ouster since the beginning of April.

An American soldier was killed Wednesday in a firefight between U.S. and Afghan troops in eastern Afghanistan, the first apparent insider attack since Washington announced a delay in troop withdrawals from the country.  

So-called "green-on-blue" attacks -- when Afghan soldiers or police turn their guns on international troops -- have been a major problem during NATO's long years fighting alongside Afghan forces.

The white police officer who fatally shot a fleeing black man in the U.S. city of North Charleston has been fired after he was charged with murder, the mayor said Wednesday.

Speaking at a highly charged press conference frequently interrupted by residents angered at America's latest high-profile police killing of a black man, Mayor Keith Summey said the city had moved quickly to fire the officer after Saturday's shooting.

The U.S. and French military are assisting in the search for a Romanian mineworker kidnapped in Burkina Faso and believed to have been taken into Mali, Burkina Faso's security minister has said.

Both the France and U.S. have drones based in Niger, which neighbors Burkina Faso, as part of efforts to combat Islamist extremists in the region.