Erstellt am: 1. 4. 2015 - 13:42 Uhr

Nigeria's new hope?

Reality Check: who is Muhammadu Buhari? What's going on in Iran nuclear talks? And the latest from Istanbul after a hostage crisis.

Nigerian Democracy

President Goodluck Jonathan concedes defeat as Muhammadu Buhari becomes the first Nigerian politician to unseat a sitting leader at the ballot box.

EPA/STR

Incumbent Nigerian president Goodluck Jonathan (L) and his election rival Muhammadu Buhari shaking hands after signing a deal in March promising to respect the outcome of a the polls and to encourage their supporters to refrain from violence.

Buhari is a former military ruler, but campaigned as a born-again democrat. Richard Dowden, director of the Royal Africa Society explains who Buhari is and what the election means for democracy in Nigeria.

Iran Nuclear Talks

Negotiations in Lausanne, Switzerland, between six major powers and Iran have been extended beyond Tuesday’s deadline. The aim is to reach an outline accord reining in Tehran's nuclear programme, with more talks in coming months on the details. We ask Professor Ali Ansari from the University of St Andrews what’s behind the delay.

Istanbul Unrest

Protesters clashed overnight with Turkish police after Tuesday’s hostage crisis. Two far-left militants and the prosecutor they had taken hostage were killed in a shootout.

EPA/Ulas Yunus Tosun

A scene from March 2014, when protesters clashed with riot police during a demonstration for Berkin Elvan, the 15-year old boy who died that month from injuries sustained during anti-government protests on Istanbul's Taksim Square in 2013.

The prosecutor had been leading an investigation into the death of a 15-year-old boy who died last year after being injured in anti-government protests in 2013. Dorian Jones reports: