attack

Video footage shows passengers running through carriages away from flames and clambering out of train windows.

The incident happened at around 20:00 local time (11:00 GMT) near Kokuryo station, in the city's western suburbs.

Police say a man in his 20s was arrested at the scene. Local reports suggest he was in a Halloween costume.

Eyewitness reports and footage appears to show a suspect in a bright purple and green suit, similar to the Joker character from the Batman comics.

The strike, near Kabul airport, killed 10 members of one family, including six children, relatives have told the BBC.

The US military said it was targeting a vehicle carrying at least one person associated with the Afghan branch of the Islamic State group.

The US was assessing and investigating reports of civilian deaths, it added.

American commanders said there were "significant secondary explosions" after the drone strike - implying there were explosives at the scene - which may have harmed people nearby.

Three people died after gunmen targeted an aircraft transporting Indonesian paramilitary police at the airport of this remote Papuan regency.

Liberation Army gunmen launched an attack at the Trigana Air twin otter which had arrived carrying 18 Brimob personnel.

Two people, including the pilot, were injured before a gunfire ensued on the airfield between the Liberation Army members and Indonesian security forces.

Three people who died have been identified as migrants from Indonesia's South Sulawesi province.

Police released the only detained suspect on Tuesday, saying there was no evidence to link him to the attack.

They now say more than one suspect may be on the run, possibly armed, and security has been stepped up in the German capital.

So-called Islamic State (IS) said one of its militants carried out the attack, but offered no evidence.

The former suspect, a Pakistani national named Naved B, had denied any connection with the attack.