Is­rael launched a wave of airstrikes across the Gaza Strip ear­ly Tues­day, say­ing it was strik­ing dozens of Hamas tar­gets in its heav­i­est as­sault on the ter­ri­to­ry since a cease­fire took ef­fect in Jan­u­ary.

Hos­pi­tals re­port­ed more than 400 peo­ple killed, in­clud­ing women and chil­dren.

The sur­prise at­tack shat­tered a pe­ri­od of rel­a­tive calm dur­ing the Mus­lim holy month of Ra­madan and raised the prospect of a full re­turn to fight­ing in a 17-month war that has killed tens of thou­sands of Pales­tini­ans and caused wide­spread de­struc­tion across Gaza.