ISTANBUL, Turkey (CNN) -- A suicide bomber hit a busy tourist area in central Istanbul on Saturday, killing at least four people, Turkish media reported.
An additional 20 others were wounded in the attack. Police cordoned off Taksim Square as helicopters flew overhead and multiple ambulances gathered at the site.
02:01 U.S. airstrike kills al-Qaeda leader responsible for deaths of two Americans, Pentagon says22
15:49 British police make ‘significant’ arrests in widening probes after London attack22
05:01 A terrorist attack in London and the all-too-familiar response21
19:00 London attack: Tourists trapped on London Eye for hours18