Following Istanbul bombing on Saturday, in which three Israeli citizens were killed, the counter-terrorism bureau advises its nationals not to travel to Turkey

As the bodies of the three Israelis killed on the spot in the attack returned home after their families identified them, the country's counter-terrorism bureau issued a travel warning for Turkey.

The officials warned its citizens about the dangers of traveling to this destination, after a suicide bomber left 4 people dead and 36 injured in a terrorist attack on Istiklal Street, in Istanbul, on Saturday. 11 of the wounded people were Israelis.

Initially a level four warning, the advice was later changed into a level two one, meaning the possibility of a “concrete attack” is considered to be dangerously high.

The prime minister’s office stated that the threat level rise changed during the last two months due to the Kurdish PKK's and the Islamic state's lately frequent activity.

The bodies of Jonathan Shor, 40, Simha Damari, 60 and Avraham Goldman, 69 were returned home in a Hercules aircraft on Ben Gurion Airport on Sunday. Five of the injured also arrived in Israel on the same day, whilst five more remained hospitalized in Istanbul under strict medical surveillance of the Israeli Red Cross representatives.

The suicide bomber in Istanbul was identified as Mehmet Ozturk, Islamic State militant living in the Turkish town of Gaziantep.