Eight things you need to know right now

Donald Trump says he would beat Democratic rival Hillary Clinton in a general election contest. Photo / AP

Your wrap of the world stories that broke overnight.

1. Fresh from victory in New Hampshire, Republican Donald Trump says he would beat Democratic rival Hillary Clinton in a general election contest. He says he can "change the game" because he has a chance of picking up the usually Democrat state of New York. The next contests are South Carolina for the Republicans and Nevada for the Democrats. Trump dismissed fellow New Hampshire winner Bernie Sanders as an unlikely nominee.

2. Unconfirmed reports in South Korea say the Pyonyang regime has 'executed' North Korean army chief of staff Ri Yong Gil. Ri could be the latest of several officials to be purged under the rule of Kim Jong Un. The BBC says he was killed for corruption and 'factional conspiracy'. Tokyo has slapped new sanctions on North Korea for its rocket launch including a ban on shipping from the country and its nationals from entering Japan.

3. A wild elephant went on an hours-long rampage in West Bengal, India. No one was hurt but the elephant damaged dozens of homes, cars and motorbikes after wandering into the town of Siliguri from a nearby forest. It was eventually controlled with tranquillizer and taken to an elephant park. It will eventually be released into the wild.

4. At least 35 people were killed in twin suicide bomb attacks in Nigeria this morning. The attack happened at the Dikwa camp for people displaced by Boko Haram's insurgency.

5. The drivers of London's famous black cabs brought the area around Parliament to a standstill, choking traffic for 90 minutes in a protest against Uber and regulations they say compromise passenger safety.

6. A new Harry Potter book is to be published on July 31. Author JK Rowling's script of the stage play Harry Potter and the Cursed Child will pick up the wizard's story 19 years after the final novel. Rowling says it is the official sequel to the book series.

7. The investigation into the German train crash that killed 10 is focusing on a signalling error. German police have so far rejected as speculation media reports that a controller turned off an automatic safety system shortly before the crash.

8. The BBC reports that traditional leaders in South Africa have expressed 'disquiet' over chief Mandla Mandela's conversion to Islam. The Congress of Traditional Leaders told the BBC it could affect his ability to uphold Xhosa traditions. Mandela, the 42-year-old grandson of the late former President Nelson Mandela, converted late last year and got married in a mosque last week - his fourth marriage. He is believed to have converted to marry a Muslim.