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Hello, I'm Joe Mocintosh with the BBC news.
Egyptian officials say a large car bomb has exploded near a security building on the northern outskirts of Cairo, 22 people were injured in the blast, including 6 policemen. Officials said the bomb had been detonated by a remote control. Bill T is a Cairo-based journalist.
"It was a car bomb blast at a state security building in xx, which is about 10 kilometers north of the centre of the capital. The Interior Ministry has confirmed that the assailant apparently left the car outside the building and xx away by a motorcycle." There's been no word on who carried out the attack, but insurgents allied with the Islamic State have vowed to continue to strike Egypt's security forces.
The United States has submitted draft proposals for UN arms embargo on South Sudan after its president Salva Kiir refused to sign a peace deal. The agreement is meant to put an end to the 22-month-old conflict, which pitched troops loyal to the president against forces allied to his former deputy Riek Marcha. He's already signed the accord. But Mr Kiir has said he needed several more days for consultation.
The Brazilian Lower House of Congress has approved a bill, which lowers the age of criminal responsibility from 18 to 16. The bill is a constitutional amendment, and still faces two votes in the Senate. It's a controversial issue that split Brazilian society. Julia K reports from Rio.
"If this change is approved, teenagers between 16 and 18 years of age in Brazil will face the same sentences as adults for crimes such as murder with intent to kill and rape. Currently, they're sent to juvenile centres, where the maximum detention period for any crime is a three years. Those in favour of reducing the age of criminal responsibility say the current system breeds a feeling of impunity among young offenders and encourages crime."
The United Nations Humanitarian Chief Stephen O'Brien has strongly criticised the Saudi-led coalition in Yemen for bombing the port of Hodaidah, saying it was a violation of the International Humanitarian Law. Mr O'Brien stressed that Hodaidah was an important lifeline for bringing in food and medicine.
"I'm extremely concerned that the damage to the port of Hodiadah could have a severe impact on the entire country, and would deepen humanitarian needs, making more people food insecure, leaving them without access to water or medicines, and which could also mean the spread of disease."
A report says scientists may have overestimated the level of carbon emissions in China over the past decade, because of confusion about the type of coal being used there. The research team, writing in the journal Nature, said more low-grade coal had been burned in Chinese power stations than was previously thought, and that the fuel produced up to 40% less carbon.
This is the world news from the BBC.
Police in the US city of St. Louis have made nine arrests during protests after police shot and killed a black teenager. Officers said an 18-year-old had pointed a handgun when they were trying to search a house in the north of the city. Dozens of demonstrators took to the streets and blocked a major road in the city.
A report by the US space agency NASA says that parts of California are sinking faster than ever, because too much water is being pumped out of the ground. The region is suffering a severe draught. Satellite imagery has revealed that parts of the intensively-farmed St. H Valley in Central California have experienced subsidence of up to five centimetres a month.
The authorities in the US state of Washington say three firefighters were killed while battling a fast-moving wide fire. Laura B reports.
"The three firefighters were killed as they tried to save the town of Twisp in the north of the Washington State. Four others are being treated in hospital. Residents were told to leave the area, as high winds fanned the fast-moving flames. Conditions are said to be very dangerous. Nearly 30,000 firefighters and support staff are battling blazers across ten western US states, and around seven million acres of land have gone up in flames this year. The US military announced this week that it would be sending in troops to help."
Scientists in the United States say they've come up with a new way of helping to fight climate change: using carbon in the atmosphere to build nano fibres. These are tiny complex strands used in medicine, the textile industry and in expensive industrial components. The researchers say they've devised a process through which a liquid sole, heated by solar power, drinks in carbon dioxide from the atmosphere, and produces ten grams of fibres an hour. Sceptics are impressed by the chemistry, but say they doubt whether it could ever produce enough to tackle climate change.
BBC news.