Handheld walkie-talkies and other wireless communication devices used by Hizbollah were detonated across Lebanon on Wednesday, killing at least 20 people and injuring at least 450, a day after thousands of pagers exploded in the country.

The blasts compounded the shock in Lebanon following Tuesday’s unprecedented attack using pagers, which Hizbollah blamed on Israel, vowing revenge. The militant group and Israel are engaged in a war of attrition across the Israel-Lebanon border, which has raised fears of a broader conflict.

The latest deaths and injuries brought the toll from the two days of blasts to 32 dead, including at least two children, and more than 3,000 injured. Almost 300 of those wounded in Tuesday’s blasts remained in a critical condition on Wednesday following bloody scenes across Lebanon.