Israel’s attack on Hezbollah’s communication devices raised expectations of a decisive shift in their war of attrition. Instead, the fighting has returned to a standoff.

Bulgaria and Norway became new focal points on Thursday of a global hunt for who supplied Hezbollah with the thousands of pagers that exploded in Lebanon this week in a deadly blow to the militant group.

At least 37 people have been killed and more than 3500 wounded after two days of exploding devices in Lebanon.