( CNN) A congressional aide who was in the chamber when Homeland Security Secretary John Kelly briefed lawmakers tells CNN the ban on electronics on certain US-bound flights from the Middle East and Northern africa could expand not only to Europe, as is being discussed, but likewise to flights departing from the US to overseas.

Kelly did not indicate any new threats or intelligence to warrant the expansion, but “gently planted a seed in the minds of everyone in the chamber that we should start preparing for and thinking through” the scenario that the electronics ban could come to US soil, the aide said.

That means any electronic device larger than a cell phone would not be allowed on flights leaving the US , not just certain inbound US flights, as is currently the occurrence. While Kelly didn’t said here today outright, “we could read between the lines, ” the aide said.