Even after launching by Hamas of more than 2,000 rockets already, the Israelis estimate that thousands more remain from an original supply of 6,000 in the hands of Hamas itself and another 4,000 in the hands of the hardline militia, Islamic Jihad.
Those include the heavy M-302 rocket with a range of 160 kilometres, enough to hit most of Israel, the official said, adding that it had captured and destroyed many of those before the recent conflict erupted.
Many other rockets, he added, were destroyed by the Israeli Iron Dome missile defence system. But he said smaller missiles, despite having smaller payloads, were harder to hit because of their size and limited time in the air. These include the M-75, with a range of 75 kilometres, the Grad, which reaches 45 kilometres, and the homemade Qassam rocket, with a range of just 17 kilometres.