UNITED NATIONS, June 28 (Xinhua) — UN Secretary-General Ban Ki-moon on Tuesday condemned the terrorist attack at an airport in Istanbul, Turkey.

"The secretary-general hopes that the perpetrators of this crime will be identified and brought to justice," said a statement released by Ban's spokesperson.

"He (Ban) stands firmly by Turkey as it confronts this threat and stresses the need to intensify regional and international efforts to combat terrorism and violent extremism," it added.

At least 36 people were killed and more than 100 others injured in two explosions that hit Ataturk Airport Tuesday evening local time.

No group has claimed responsibility for the attack.

The security situation in Turkey has deteriorated over the past year. The capital city of Ankara, the most populous city of Istanbul and some other ones have been hit by a number of bombing attacks.