Story highlights The ban took effect two weeks ago

"Could we see an expansion? Possibly," said a DHS spokesperson

Washington (CNN) The ban on electronic devices on board some direct flights to the United States could expand to include more airports and devices, the Department of Homeland Security said Tuesday.

The existing ban -- which governs certain devices from 10 specific African and Middle Eastern airports in eight countries -- requires passengers on those flights to place electronic devices larger than cellphones in their checked luggage.

"Could we see an expansion? Possibly, we have not ruled out that there could be an expansion in the future," DHS spokesman David Lapan told reporters. He added that any expansion to the ban -- which took effect two weeks ago -- is not imminent.

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The Department of Homeland Security is also targeting and isolating certain aircraft for additional screening upon landing in the United States, according to a source with knowledge of the screening procedures.

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