39 killed in an Istanbul nightclub by one lone nutter
http://www.bbc.co.uk/news/live/world-38482606
President Erdogan: Turkey will 'do whatever is necessary'
"Turkey is determined to continue to fight to the end against terror and to do whatever is necessary to ensure the security of its citizens and secure peace in the region," President Erdogan's statement said.
The country, which is fighting against both the Islamic State group and the Kurdish PKK group, has seen repeated attacks in recent times, many on crowded places packed with civilians.
Here is a list of some of the most deadly ones in 2016:
10 December: Twin bomb attack outside a football stadium in Istanbul kills 44 people, Kurdish militant group claims responsibility
20 August: Bomb attack on wedding party in Gaziantep kills at least 30 people, IS suspected
30 July: 35 Kurdish fighters try to storm a military base and are killed by the Turkish army
28 June: A gun and bomb attack on Ataturk airport in Istanbul kills 41 people, in an attack blamed on IS militants
13 March: 37 people are killed by Kurdish militants in a suicide car bombing in Ankara
17 February: 28 people die in an attack on a military convoy in Ankara