Turkey has blamed Syria for Saturday's car bombings that killed at least 46 people in Reyhanli, a main hub for Syrian refugees and rebels.
The town is located about 1 100 kilometres south-east of Istanbul, which is competing against Madrid and Tokyo for the 2020 Games. The IOC will select the host city on September 7 in Buenos Aires.
The Istanbul bid committee offered condolences Monday to victims of "this rare and isolated attack" and said "we must reiterate that safety and security are the utmost priority of Istanbul 2020."
The statement adds that Turkey has a "very strong safety and security record" in hosting international sports events.