Israel declares state of war after surprise attack from Hamas

Israel has declared a state of war after a surprise attack launched by Hamas.

Dozens of gunmen from the Palestinian militant group have infiltrated southern Israel from the Gaza Strip and fired thousands of rockets as far north as Tel Aviv.

It is one of the most serious escalations in years between Israel and Hamas, which rules Gaza.

Palestinian militants in Gaza launched dozens of rockets at Israel, setting off air raid sirens across the country.

Gaza residents say they heard armed clashes along the separation fence with Israel, and saw significant movement of armed fighters.