Twenty people are stranded 30 metres in the air for at least four hours, after a roller coaster becomes stuck at a Six Flags America theme park in Maryland.

A young girl watching television in an Arizona barber shop runs in fear as two rounds of gunfire puncture a window on either side of her head, showering her with glass.

German investigators say they have found no evidence so far that an Iraqi man detained after the Borussia Dortmund bus attack was involved in the bombing, but he is suspected of membership in the Islamic State group.

The likelihood of one of Saturn's moons, Enceladus, harbouring life has received a huge boost, thanks to NASA's Cassini spacecraft discovering a key element spewing from its surface.

A US-led air strike mistakenly killed 18 members of a Kurdish and Arab militia backed by Washington south of the Syrian city of Tabqa, the Pentagon says.