Turkey's main opposition presidential candidate, Muharrem Ince, has acknowledged defeat, but has warned that the country is beginning a dangerous period of one-man rule under President Erdogan. We have a special coverage, Newshour's Razia Iqbal reports from Istanbul. Also in the programme: As the Royal Observatory Greenwich in London starts to study the sky again - after a break of 60 years -- we speak to one of their astronomers; and the underwater rescue mission in Thailand after a children's football team is trapped in a flooded cave. (Photo: President Erdogan and his wife. Credit: Getty Images)

Before the end of ballot-counting, Turkish President Recp Tayyip Erdogan has claimed victory in both presidential and parliamentary elections. The opposition has complained that the outcome is still not clear. Also in the programme: European leaders grapple with migration issues at a Brussels summit; and a row over players' behaviour during a World Cup match between Serbia and Switzerland. Photo: Supporters of Recep Tayyip Erdogan's AK Party react to election results in Taksim Square, Istanbul. Credit: REUTERS/Kemal Aslan

Turkish voters are going to the polls to decide whether to grant President Recep Tayyip Erdogan a second five-year term, in the most fiercely fought elections in the country in years. We have the latest from Newshour's Razia Iqbal in Istanbul. Also in the programme: Seventeen EU leaders will meet to discuss immigration today, as rifts deepen over how to handle the influx of migrants; and football's governing body, FIFA, has begun disciplinary action against two Swiss players of Kosovan origin over their use of a nationalist gesture. (Photo: A woman arrives at a polling station in snap twin Turkish presidential and parliamentary elections in Istanbul on June 24, 2018. Credit: Getty Images)

President Emmerson Mnangagwa escaped unhurt after an explosion disrupted his election rally in Bulawayo. He said the blast was an attempt to kill him, but would not affect next month's poll. Also in the programme: Final rallies on the eve of Turkey's presidential election; and Saudi Arabian women finally get the right to drive. (Photo: Zimbabwe's President Emmerson Mnangagwa addresses a rally in Bulawayo. Credit: Ken Maur/AFP/Getty Images.

Ethiopia's prime minister has condemned an attack on a huge rally where he'd been speaking, calling it an attempt to undermine the country's unity. Also in the programme: Today President Erdogan of Turkey appeals for votes ahead of Sunday's general elections, in which he's facing a strong challenge; and Malta asks the migrant rescue ship, Aquarius, to help a migrant boat off the coast of Tunisia. Picture: Ethiopia Prime Minister Abiy Ahmed waves to the crowd during a rally on Meskel Square in Addis Ababa. Credit: AFP

The United Nations says the Venezuelan police and military are carrying out hundreds of extrajudicial killings under the pretext of fighting crime. The UN human rights chief, Zeid Ra'ad Al Hussein, said nobody was being held to account for the killings, suggesting the rule of law was virtually absent in Venezuela. Also in the programme: Elections in Turkey and allegations the former tennis player Boris Becker carried a fake diplomatic passport. (Photo: Venezuelan armed forces. Credit: Getty Images)