Lebanon-based militant group Hezbollah and Israel have announced large-scale military operations against each other, media reports said Sunday.

According to a statement from Hezbollah, an Iran-backed group, several explosive drones have been launched, targeting key Israeli military sites.

Hezbollah said it has launched "more than 320" Katyusha rockets at Israel.

In response to the threat, the Israeli military initiated pre-emptive strikes on targets in Lebanon.

The IDF announced these strikes early Sunday, stating that they had detected preparations by Hezbollah for "large-scale" attacks on Israeli territory.

Israeli Air Force fighter jets have been deployed to neutralise these threats, focusing on Hezbollah positions that posed an immediate danger to Israeli civilians.

This escalation comes after weeks of growing tension, with Hezbollah and its regional ally, Iran, vowing to avenge the assassination of its military commander Fuad Shukr last month.

The group has called the attack on its commander as a direct provocation and an act of war.