Videos on social networks show the moment of the explosion| Photo: Reproduction TwitterA terrorist bomb attack on Istiklal Street in central Istanbul, Turkey, left six dead and 53 injured, this Sunday ( ). The information was confirmed by the country's president, Tayyip Erdogan. )"People were killed in a bomb attack at 16h20 (local time, 10H20 of Bras\u00edlia) in Istiklal. The state will meet the organizers of this terrorist attack," Erdogan said in a speech on public television broadcaster TRT. "The population can be sure that the aggressors will be punished. Four people died on the spot and two in the hospital; there are six dead and 53 injured according to the latest information," added the Turkish president. In videos posted on social networks it is possible to see an explosion, in the form of a flash, in the middle of the street, in a pedestrian area full of shops that at any time of day it is usually full of passersby, among them many tourists. The Turkish telecoms authority RTUK banned broadcasters from broadcasting footage from the blast site and the police cordoned off the area.