Israel and Hezbollah exchanged cross-border strikes as Lebanon reels from deadly back-to-back attacks targeting the electronic devices of the Iran-backed militant group’s members that left dozens dead and thousands of people injured.

The device explosions appeared to be the culmination of a monthslong operation by Israel to target as many Hezbollah members as possible all at once.

Israel launched a series of strikes on Hezbollah targets Thursday as the war against the Lebanon-based group widened in the wake of two consecutive days of deadly explosions triggered in wireless devices.