Among the 20 targets, Israel jets attacked Wednesday – in the wake of a Palestinian double-missile attack on Israeli cities – were a Hamas terror tunnel and a rocket team. DEBKAfile: The Palestinians anticipated Israel’s reprisal and evacuated personnel from their bases in good time. The IDF had known about the tunnel for months, as the twin to the one destroyed last week when it was already 200m inside Israel. Israel’s top-level officials decided not to demolish both tunnels at the same time so as not to trigger an extreme Hamas response. This restraint boomeranged early Wednesday with Palestinian missile attacks from Gaza on two of Israel’s four major cities – Beersheba in the south and Greater Tel Aviv on the coast. The Grad missiles were upgraded to carry extra-large explosive warheads at greater distances.