Three suicide bombers opened fire before blowing themselves up at the entrance to the main international airport in Istanbul late on Tuesday at 10 pm local time (12:30 am IST). <br />Citing Turkish Justice Minister, Turkish broadcaster Haberturk said 36 people were killed in the attack while 147 people were left injured. <br />The terrorists blew themselves up when police fired shots at them right before they reached a security checkpoint at the arrivals hall of the Ataturk airport, officials said.