The troops were killed in an explosion, the army said, without elaborating. The deaths will likely fuel calls for a cease-fire and heighten Israeli public anger over ultra-Orthodox exemptions from the military. In January, 21 Israeli troops were kille in a single attack by Palestinian militants in Gaza. Last month, Israel’s Supreme Court ordered an end to government subsidies for many ultra-Orthodox men who don’t serve in the army. A new draft law hasn’t been passed, but the coalition of Prime Minister Benjamin Netanyahu this week voted in favor of extending exemptions for religious men. Altho…