Four school students are injured and one killed by a gunman who opened fire at Chardon High School in Ohio before being taken into custody, reports say.

The progressive shrinking of Arctic sea ice is bringing colder, snowier winters to the UK and other parts of the Northern Hemisphere, scientists show.

A man who posted racist comments on Twitter directed at Newcastle United is given a suspended jail sentence.

A fresh attempt to evacuate two wounded journalists from Homs ended in failure, the Red Cross says, as Syrian forces launch a new offensive against opposition-held towns.

It may be possible to one day create "an unlimited source" of human eggs, according to US fertility doctors.