ANKARA, March 13, 2016 (Xinhua) -- Photo taken on March 13, 2016 shows the blocked road near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya) 
ANKARA, March 13, 2016 (Xinhua) -- Rescuers work at the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Police block off the road near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Zou Le)
ANKARA, March 13, 2016 (Xinhua) -- Police block off the road near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Zou Le)
ANKARA, March 13, 2016 (Xinhua) -- Rescuers work at the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Rescuers work at the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Emergency vehicles are seen near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Zou Le)
ANKARA, March 13, 2016 (Xinhua) -- Photo taken on March 13, 2016 shows the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Rescuers work near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Rescuers work near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Mustafa Kaya)
ANKARA, March 13, 2016 (Xinhua) -- Police block off the road near the explosion site at Kizilay square in Ankara, Turkey. An explosion hit downtown Ankara Sunday killing at least 27 people and injuring 75 others, Turkish sources told Xinhua. (Xinhua/Zou Le)
