BBC news, hello I'm Jerry Smit.

Police in Jerusalem have shot dead two Palestinians in separate attempted stabbing attacks on Israelis in the city. In Bethlehem on the West Bank, dozens of Palestinian protestors clashed with the Israeli troops. Paul Adams reports.“Fresh violence on the streets of Jerusalem. An Israeli woman stabbed after nightfall when she boarded a bus on busy Jeffer road. The police say she was not badly hurt but the attacker was shot dead. They came as the authorities mounted a major security operation, hundreds of extra-soldiers mobilized across the country as the government's Prime Minister Benjamin Netanyahu struggles to end a wave of Palestinian attacks. New Israeli checkpoints in serval Jerusalem's Arab neighborhoods.”

A new study has found the Ebola virus can linger on in male survivors for at least 9 months, much longer than previously thought. The researchers took semen samples from nearly 100 men in Sierra Leone who had recovered from the disease. In a quarter of them, the virus was still present, 7 to 9 months after they became sick. It's not clear whether they were infectious.

The head of Brazil's army has warned that there is a risk of a social crisis developing. Brazil is facing a severe economic downturn, a corruption scandal at the state-owned oil company and attempts to impeach the president. From Rio De Janeiro, here's Will Davis.“In a speech to fellow officers at the weekend, general Eduardo Villas Boas warned that Brazil was living through a political, economic and ethical crisis which could have negative effects on stability. Details have only just come out. But the chief of staff's comments could be interpreted as a strain into a taboo area. Brazil's president Dilma Rousseff is struggling to hold on to power. A damaging corruption scandal and an economic recession has weakened her support and her authority. For several weeks, opponents in congress have been trying to begin an impeachment process against her.”

Police in Mexico have arrested a 14-year-old boy who was recruited on Facebook to carry out a contract killing. The boy who was called * told police a drugs gang in the border town of Tijuana gave him a gun and took him by taxi to shoot a rival dead.

President Obama has announced that the United States is sending about 300 military personnel to Cameroon to conduct airborne surveillance and reconnoissance operations. It's part of increasing efforts by Washington to combat Boko Horam militants. As Gary O'Donoghue reports from Washington.“It's likely that the intelligence gathering will be done by drones and it's expected that they'll conduct missions over other countries in the region beyond the borders of Cameroon. A senior administration official told the BBC that the force have been requested at the invitation of and in coordination with the Cameroonian government. He said the troops will be deployed on two existing military bases run by the country's armed forces.”

World news from the BBC.

A senior United States official has told the BBC that the American and Russian militaries are close to finalizing a memorandum of understanding. It sets out basic air safety procedures in the skies above Syria. The two sides hope to prevent accidental clashes between planes during their parallel but uncoordinated air strikes.

More than 100 prominent American women have launched a lobby group to curb gun violence, a key issue in the early stages of the presidential campaign. The bi-partisan group is led by a former congresswoman Gabrielle Giffords who in 2011 narrowly survived an assassination attempt.

Scientists have unearthed the fossil of a mammal which lived 125 million years ago. They say it's so well preserved that they'll be able to conduct a detailed analysis of the remains. Rebecca Romero has the story.“The researchers described this ancient mammal as an exceptionally cute fur ball. Called Spinolestes, it was unearthed in a limestone quarry in central Spain and unusually this creature is preserved with its internal organs, skin and fur intact. It would have been small, somewhere between the size of a mouse and a rat with big ears and a pointy face and has short mane and the soft fuzzy belly. But its lower back was covered in short hedgehog-like spines and some tough scales helping it to ward off predicators such as the small dinosaurs that shared its habitat.”

The former president of Benin, Mathieu Kérékou has died. He was 82. Mr. Kérékou led the country for 30 years after seizing power in a military coup in 1972. He was nicknamed the chameleon because of his changing political affiliations. After first embracing Marxism, he later helped pave the way for multi-party politics and returned to power as a democratically-elected president in 1996. The government has announced a week of national mourning.

BBC news.