Lebanon’s death toll from a series of walkie-talkie and pager explosions this week rose to 37, according to local authorities, an illustration of the devastation wrought by a wave of suspected Israeli attacks against Hezbollah militants.

A second wave of hand-held devices simultaneously exploded in Lebanon on Wednesday, killing at least 20 people and injuring hundreds more, one day after 12 people were killed and thousands wounded in a similar attack that targeted members of Hezbollah.

Explosions continued Wednesday in Lebanon, killing at least 20 people. The Lebanese government and Hezbollah blame Israel for the apparently coordinated attack. Israel’s defense minister said they are “at the start of a new phase in the war.

The Hezbollah militant group said it is conducting a "security and scientific investigation” into the explosion of pagers across Lebanon on Tuesday.