BBC: An independent candidate has been shot dead in Istanbul ahead of Turkey's general election on 22 July.
Tuncay Seyranlioglu's car was hit by gunfire on a highway as it was taking him away from a TV studio.
The businessman, who had assets in media and property, was standing to be an MP in Istanbul. Several suspects are said to have been held over the attack.
Meanwhile, Turkey's prime minister has said he will quit politics if his party fails to win a decisive majority.
"If we can't come to power alone, I'll leave politics," local television quoted Recep Tayyip Erdogan as saying.
The prime minister's AK Party wants to win a majority large enough to enable it to form a strong government without relying on coalition partners. Turkish poll candidate shot dead (more)
Mark Alexander
