BBC news with Johnathon Izard.

The US Defense Secretary James Mattis says any threat to the United States or its allies will be met with massive military response. He was speaking after briefing President Trump following North Korea’s latest nuclear test. Mr. Trump has warned that America may stop trading with any country that does business with the North. South Korea says it carried out a live fire ballistic missile exercise in response to the North nuclear test. There’s been widespread international condemnation of Pyongyang with China and Russia both expressing deep concern.

The German Chancellor Angela Merkel appears to have held her ground against her rival Martin Schulz in the only live televised debate in the election campaign with opinion polls taking immediately after the broadcast showing her ahead. The two clashed over foreign policy issues including Turkey and North Korea.

Columbian politicians have urged the government to take a tough stance in peace negotiations due to end on Monday with the ELN rebel group which has admitted killing one of its hostages.

The Iranian judiciary has confirmed that a US citizen appeal against the 10-year jail sentence has been rejected. Chinese born Xiyue Wang has been accused of spying, a charge he denies. Appeals against 10-year prison terms were also rejected in the case of three other people.

One of Cambodia’s only Independent newspapers, the Cambodia Daily, has published its last edition with the frontpage headline "Decend into Outright Dictatorship". The paper accused the government of forcing its closure by demanding that it pay a disputed tax bill of 6 million dollars.

Maria Sharapova’s return to the Grand Slam Tennis after 15 months’ ban for doping has ended in the 4th round of the US Open. The Russian lost in 3 sets to the No.16 seed from Latvia, Anastasija Sevastova. The Latvian will now play American Sloane Stephens in the quarter-final.

That’s our latest summary. Fiona McDonald will be here at the top of the hour with a full bulletin of BBC news.