A teacher in the US state of Utah who was legally carrying a gun in her school accidentally shot herself in the leg, police say.

Argentina's Congress passes a bill designed to defy a US court ruling that pushed the country into default in July

Yahoo says the US government "threatened" to fine it $250,000 a day if the search giant failed to hand over user data.

A giant fossil, unearthed in the Sahara desert, has given scientists an unprecedented look at Spinosaurus - the largest-known carnivorous dinosaur.

The CIA triples its highest estimate for the number of fighters with Islamic State as the US seeks Turkey's support for action against the group.

A Seattle judge orders an HIV-positive man to stop spreading the disease and seek treatment after he infected eight people in four years.

A police manhunt is under way in the US state of Ohio after teenage triple murderer TJ Lane and another inmate escape jail.

The judge in the trial of Oscar Pistorius is due to rule if he is guilty of culpable homicide, after clearing him of murdering his girlfriend.