Palestinian militants in the Gaza Strip carried out an unprecedented infiltration Saturday into southern Israel, sending fighters across the border and firing thousands of rockets into the country as the ruling Hamas militant group announced the beginning of a new operation.
The Israeli military put the country on war alert and began striking targets in Gaza in response, setting the stage for what was likely to be a new heavy round of fighting between the bitter enemies. In a serious escalation, salvos of rockets fired from Gaza set off constant air raid sirens as far north as Jerusalem.