Strikes between Hezbollah and Israel have been common for decades, but attacks between the two have ramped up sharply in the past week, raising fears of a wider war. Israel on Friday killed a senior Hezbollah commander and other members of the militant group in an airstrike in the southern suburbs of Beirut, following a week of deadly attacks across Lebanon that included detonations of walkie-talkies and pagers that killed at least 37 people and wounded thousands. Hezbollah, the apparent target, blamed Israel for the attacks. On Monday, at least 356 people in Lebanon were killed in Israeli strikes, according to local officials, making it the deadliest day of conflict in the country since the exchange of fire between Israel and Hezbollah that began in October.