The US state department says it is considering all options, including sanctions, towards Ukraine after riot police moved in on protesters.

The UN is "extremely concerned" for Syrian refugees in Lebanon as a winter storm brings snow, high winds and freezing temperatures to the country.

The parents of a dead US marine whose body was returned from Greece missing its heart sue the US Department of Defense and the Greek government.

A top Republican senator's chief of staff is arrested on suspicion of possession and distribution of child pornography, the US authorities say.

The Earth could have been struck by many more huge earthquakes in its recent history than was previously thought, scientists say.

Australia's High Court has overturned legislation allowing gay marriage in the Australian Capital Territory (ACT), rendering 27 gay marriages invalid.

A cave on the northwestern coast of Sumatra holds a remarkable record of big tsunamis in the Indian Ocean stretching back thousands of years.

Air Canada orders 61 Boeing 737 MAX planes worth $6.5bn (£4.2bn) at list prices, a big win for the planemaker over rival Airbus.