By Kylie Madry MEXICO CITY (Reuters) -Mexico and Chile expressed “growing worry” on Thursday over “an escalation of violence” after several months of war between Israel and Hamas in a referral to the International Criminal Court (ICC) over possible crimes. Hamas militants launched a surprise attack in Israel in October, killing 1,200 mostly civilians and seizing 253 hostages, with multiple accounts later emerging of rape and mutilation. The Israeli retaliatory offense on the Hamas-led Gaza Strip has led to increasing international alarm and scrutiny over the deaths of civilians, especially chi…