When Eric calls for a bomb squad, he's told they are 20 minutes away, but he says that will take too long. However, when he starts working on the bomb, 20 minutes have past already, so the bomb squad could have done it.
When the Senator calls his assistant from the back of the limo, his phone is clearly ringing - the green and red answer/reject call icons are clearly visible. Made more obvious when seconds later, after completing the call, his phone rings again and we get a close up on the incoming call screen.
CTU tracked the phone call that Eric saw Naseri was making in the previous episode and it turned out to be a plan to break Jadalla out of CTU. So even though it happened in the following hour, AND it was Issac's group that took them down, AND Naseri had to escape, Naseri knew exactly Jadalla would be caught by CTU before all these happen.