WASHINGTON (Reuters) - Baggage screeners found bomb components in a carry-on piece of luggage at San Diego International Airport on Tuesday and cleared the area to investigate, Department of Homeland Security spokesmen said.

A department spokesman said the screeners found "all components of an IED" (improvised explosive device) in a piece of luggage at around 7:45 a.m. (10:45 a.m. EDT)

They then evacuated the commuter terminal of the airport and bomb specialists began to investigate, the spokesman said.

Transportation Security Administration spokesman Nico Melendez said an employee noticed a "suspicious item" in a piece of luggage as it was going through the X-ray machine.

Officials at the airport were not immediately available for comment.

Its hard to imagine any reasonable explanation for somebody having "allt he components of an IED" in their carry-on luggage.

Its scary, though I often wonder why we haven't seen more of this sort of thing in recent years.

Update:

Its a false alarm, as per Whistler in the comments:

The commuter terminal at Lindbergh Field has been re-opened Tuesday morning, after baggage screeners found what they thought were bomb-making materials in a piece of carry on luggage.

The commuter terminal was shut down and evacuated around 7:45 a.m. Tuesday, after the discovery. But authorities say what were thought to be bomb components were actually components to make toys.