BEIRUT, Sept 17 (Reuters) - Militant group Hezbollah promised to retaliate against Israel after accusing it of detonating pagers across Lebanon on Tuesday, killing nine people and wounding nearly 3,000 others who included fighters and Iran's envoy to Beirut.

Multiple explosions went off Wednesday at the site of a funeral for three Hezbollah members and a child killed by exploding pagers the day before, according to Associated Press journalists at the scene.

Hezbollah leader Hassan Nasrallah is warning Israel will face “tough retribution” after the dramatic detonation of pagers and walkie-talkies that left at least 37 people dead and more than 3,300 injured across Lebanon this week.