Arab Spring fallout: More sophisticated weapons in Gaza

Militant sources in Gaza tell CNN that a shoulder-launched anti-aircraft missile was used to try to shoot down an Israeli helicopter flying east of Gaza last week.

It is significant because it is the first time a weapon of this type has been used against an Israeli aircraft, though the missile did not manage to hit its target. Hamas, which controls Gaza, has not commented on the incident.

The weapon is said to be a Strela SA-7 and was smuggled in from the Sinai desert but originally came from Libya, according to a source in Gaza.