The Middle East peace process has been thrown into the balance by the bloodshed of Tel Aviv and Palestinian President Mahmoud Abbas is now being warned he must crack down on militants.“The only way to stop this kind of terrorist attack is by dismantling the infrastructure of terror and fighting the terrorist organisations,” said Israeli government spokesman Gideon Meir. “What we would like to see is action and not words.”The Palestinian Authority has condemned the bombing and vowed to track down those behind it. Mahmoud Abbas called a special security meeting in Ramallah later today. It is the first attack since this month’s groundbreaking summit in the Red Sea resort of Sharm al-Sheikh. Optimism at the summit was always tempered with caution and, while observing a de facto truce, Palestinian militant factions said they were not bound by a ceasefire agreed by the Israeli and Palestinian leaders.