The newly-elected President of Nigeria, Muhammadu Buhari, has vowed his government will "spare no effort" in the battle against Islamist militants Boko Haram.
In his first formal speech since his victory against opponent Goodluck Jonathan, Buhari said:
Boko Haram will soon know the strength of our collective will. We should spare no effort.
In tackling the insurgency, we have a tough and urgent job to do.
Islamic State forces have taken control of large parts of a besieged Palestinian refugee camp in southern Damascus, witnesses and a monitoring group said.
The Yarmouk camp, home to up to 18,000 people, has been caught between government forces and Syrian insurgent groups including Islamic State's rivals such as al Qaeda's Nusra Front.
"They pushed from the Hajar Aswad area and Nusra fighters have joined them," one witness told Reuters.
The witness and the British-based Syrian Observatory for Human Rights said clashes continued inside the devastated camp where food, medicine and water are scarce. The Observatory said Islamic State controlled some of the main streets in the camp.
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Police have detained a gunman who entered the office of Turkey's ruling AK Party in Istanbul after he smashed top floor windows and hung out a flag.
Private Dogan news agency initially reported two armed intruders entered the AK Party office.
The security threat occurred a day after a prosecutor in the city was shot dead as police tried to free him from hostage-takers.
Police are attending the offices of Turkey's ruling AK Party in Istanbul after two armed people were reportedly seen entering the building, a day after a prosecutor died having been taken hostage in the city.
Reuters, citing the private Dogan news agency, said several police cars were outside the building in the Kartal district with the road sealed off.
Prosecutor Mehmet Selim Kiraz yesterday died after being injured in a stand-off at a courthouse in the city.
Two of his captors, who were from a far-left group, were killed after security forces stormed the building.
Foreign Secretary Philip Hammond has said progress has been made between Iran and major powers over Tehran's nuclear programme, despite passing Tuesday's midnight deadline, but said "key issues" still need to be resolved.
"I think we have a broad framework of understanding, but there are still some key issues that have to be worked through," Mr Hammond told the BBC.
"Some of them are quite detailed and technical so there is still quite a lot of work to do but we are on it now and we'll keep going at it."
The so-called P5+1 - the US, UK, France, China, Russia plus Germany - hope to limit Iran's nuclear ambitions in exchange for relief from sanctions which have left its economy crippled.
Having mental health problems should not bar people from jobs Nick Clegg has said as investigators focus on the medical history of Germanwings crash pilot Andreas Lubitz.
The Deputy Prime Minister, who has championed mental health issues while in government, said there should be no "blanket rules" preventing people from doing certain jobs.
German prosecutors have said that Lubitz, 27, who deliberately caused the Airbus to crash in the French Alps, had therapy for suicidal tendencies some time before getting his pilot's licence.
I think it's very important that we don't, however understandable in this context, allow what is said about one individual to shape or colour the way in which we regard people who go through episodes of mental health problems.
It's very important that employers in all walks of life are as accepting of people who are recovering from mental health problems just as much as they would be people who recover from physical health problems.
I don't think, as a blanket rule, the fact that someone has had mental health problems should automatically disqualify them from certain jobs. That would be not treating people as individuals, instead treating people in an indiscriminately broad-brush way.
Nigerian election winner Muhammadu Buhari says his country proved it has "embraced democracy" after his historic victory.
Buhari, 72, became the first politician to unseat a sitting leader at the ballot box yesterday.
"We have proven to the world that we are people who have embraced democracy - we have put one-party state behind us," he said.
Mr Buhari also paid tribute to outgoing president Goodluck Jonathan for relinquishing power, telling journalists: "President Jonathan was a worthy opponent and I extend the hand of fellowship to him."
Andrew Getty - the heir to the Getty oil fortune - has been found dead at his Los Angeles home, his family have said.
Getty, 47, was found dead in a bathroom after a woman called police to the home.
A statement from the Getty family confirmed his death but provided no further details.
His parents, Ann and Gordon Getty, said they would issue a further statement once more information becomes available at this "extremely difficult time".
Getty is the grandson of J Paul Getty, who founded the Getty oil company, and one of four sons of multibillionaire Gordon Getty, who is considered one of the richest men in the US.