There are fears that weapons from Libya, including sophisticated missiles that can shoot down aircraft, are being smuggled into Gaza to help arm militants there.
In recent weeks, dozens of rockets and mortars have been fired from Gaza into Israel. One Israeli man has been killed, and retaliatory air strikes by Israeli warplanes have killed 11 Palestinians.
Violence like this is hardly new; every few months on average there is a new round of tit for tat rocket fire and Israeli air strikes.
But what is new and highly worrying for Israel is evidence that more sophisticated weapons involved in Libya’s war are flooding into Gaza through underground tunnels from Egypt.
Recent footage showed a rapid-fire rocket launcher in Gaza, identical to those used in Libya, mounted on the back of a truck and supposedly capable of firing multiple rockets in quick succession.
The Al-Quds Brigade, the armed wing of the militant group Islamic Jihad, which was responsible for the most recent attacks from Gaza, says it is the first time it has used such a device.
The UN has also highlighted the threat of MANPADS (Man-Portable Air Defence Systems), a portable surface-to-air missile that could potentially shoot down aircraft.
Yiftah Shapir, an Israeli strategic analyst, says MANPADS may now be in Gaza for the first time.
“I don’t have any doubt that weapon markets have been flooded by weapons from Libya and obviously some of them would come to Gaza, because Gaza is a big client for these type of weapons,” he said.
“[MANPADS] can shoot down a plane, from about 5 kilometres give or take, and altitude of usually up to 10,000 feet, 12,000 feet.”
Israel is now so alarmed at the influx of weapons into Gaza – particularly the anti-aircraft weapons – it has sped-up work on an anti-missile defence system for its commercial airliners.
Every Israeli passenger plane will soon be fitted with the new laser technology which works by throwing missiles off their target.
So far there is no evidence that Islamic Jihad or any militant group in Gaza has tried to use such weaponry.
But one political analyst in Gaza, Mkhaimar Abusada, says if they do with any success, there will be hell to pay.
“If Hamas or the Islamic Jihad are going to shoot down an Israeli helicopter or an Israeli drone, that will be definitely portrayed as a big victory for the Palestinian resistance,” he said.
“But that will be a justification, I guess, for Israel to launch a massive military operation against Gaza.”
Israel recently gave the green light for its military to launch a ground operation in Gaza, something that has not been seen since the last war there three years ago.
And more widely there are international efforts to stem the supply of weapons from Libya.
The UN is pressuring Libya’s new leaders to do everything possible to track down all missing shoulder-fired missiles to keep them away from groups like Islamic Jihad or even Al Qaeda.
A US official says most of Libya’s missing stocks of MANPADS are still in the country, but they need to be secured before they are smuggled out.