Pagers carried by thousands of Hezbollah operatives exploded at about the same time Tuesday afternoon, leaving more than 2,700 injured and eight dead in an unprecedented event that struck across Lebanon. The affected pagers were from a new shipment that the group received in recent days, people familiar with the matter said. A Hezbollah official said hundreds of fighters had such devices, speculating that malware may have caused the devices to explode. The official said some people felt the...