The U.N. chief also expressed his sympathy and condolences to the families of the victims and to the Government and people of Turkey, and wished a quick recovery to those injured.
Furthermore in a news release today, the U.N. tourism agency said that it was "deeply shocked" by yesterday's terrorist incident.
"This attack reminds us once more that we are facing a global threat that requires us to work closer together to have a firm and coordinated response that engages all governments and the international community," said UNWTO Secretary-General, Taleb Rifai.
"Turkey is a leading tourism destination and we are confident it will continue to be so with the support of all," he added, expressing the agency's full solidarity with the people and the Turkish Government.
The U.N. Security Council also condemned the attack calling it heinous and cowardly in its press statement issued on Dec. 11. According to the Ukrainian Mission to U.N., the statement was initiated by Ukraine and supported by the rest of the U.N. SC members.
"The members of the Security Council underlined the need to bring perpetrators, organizers, financiers and sponsors of these reprehensible acts of terrorism to justice and urged all states, in accordance with their obligations under international law and relevant Security Council resolutions, to cooperate actively with the Government of Turkey and all other relevant authorities in this regard.
"The members of the Security Council reiterated that any acts of terrorism are criminal and unjustifiable, regardless of their motivation, wherever, whenever and by whomsoever committed.
"They reaffirmed the need for all States to combat by all means, in accordance with the Charter of the United Nations and other obligations under international law, including international human rights law, international refugee law and international humanitarian law, threats to international peace and security caused by terrorist acts," the statement reads.
Any acts of terrorism are criminal and unjustifiable - #UNSC condemned terrorist attacks in #Istanbul.
Read press statement proposed by 🇺🇦 pic.twitter.com/VhMHwNFarl
- UKR Mission to UN (@UKRinUN) 12 декабря 2016 г.