An aggressive crackdown by Egypt's interim government on smuggling tunnels between Egypt and the Gaza Strip is crushing the Palestinian enclave's economy, sparking concerns it could fuel a militant backlash. To get around the blockade, Gazans smuggle goods, and the tunnels closure has sent prices soaring in the past three weeks. Many Gazans now buy the Israel-shipped fuel for seven shekels ($2) a liter - more than twice as much as that smuggled from Egypt. The cost of cement, another major smuggled item, has reached $1,500 a ton from $1,000, said Ahmad Abdul-Rahman, a merchant. Show the effects in the Gaza market for goods and services.