The UK Foreign Office confirmed the arrests, allegedly linked to plans to fire a rocket at a football stadium.

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One of them was determining the exact moment at which an astronaut must fire a rocket booster to enter the moon's gravity field.

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The pulled handle would fire a small rocket through the airplane's roof and release the parachute.

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Indirect fire is a reference to rocket and mortar fire, and the U.S. military suspects hard-line Shiite militants stage such attacks.

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Ironically, Israel has tapped air power more frequently in recent weeks, in part because it's seen as a more pinpoint or precise way of killing rocket-launch teams than artillery fire, which sprays shrapnel over a wide area.

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The rocket-fire came amid heightened tensions following a series of Israeli air strikes on targets in southern Syria on Friday and Sunday.

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The stated Israel aim is to deal a blow to Hamas and prevent or reduce rocket fire.

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If the rocket fire continues, it will have to find a military answer.

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Others, including Marie's colleague Paul Conroy and French journalist Edith Bouvier, were also badly injured when a house in Homs serving as an informal media centre came under rocket fire.

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