Israel has demolished the West Bank home of a teenage bomber who was involved in one of Tuesday's attacks. Troops destroyed the family home of Khamis Jarwan, who was identified by Palestinian and Israeli sources as being responsible for the first bombing at a shopping centre in Rosh Haayin, near Tel Aviv. Israeli police are on nationwide alert and have been setting up roadblocks on key roads and at the entrances to Israeli towns in an attempt to head off any further attacks. The al-Aqsa Martyrs Brigades claimed responsibility for the Tel Aviv attack, while Hamas said it was behind the second bombing outside a Jewish settlement in the occupied West Bank. The two groups said they carried out the attacks - in which two Israelis as well as the bombers died - in retaliation for an Israeli raid last week. But the two groups stressed they were still sticking to a ceasefire that was declared in June. Israeli officials say they have refrained from major military retaliation, saying Israel wants to achieve calm to advance on the "roadmap" plan for peace. **PHOTO CAPTION*** An undated file photo from the family album shows 17-year-old Palestinian Khamis Jerwan from the Askar refugee camp in the West Bank city of Nablus. (AFP/HO)