An Israeli airstrike killed four people in Beirut early Tuesday, the Lebanese health ministry said, rocking an already shaky ceasefire between Israel and Hezbollah.

The leader of Lebanon’s Hezbollah group has warned that if Israel’s attacks on Lebanon continue and the Lebanese state does not act to stop them, the group will eventually resort to other alternatives.

A Hezbollah official was among four people killed Tuesday in an Israeli strike on south Beirut, Israel and a Hezbollah source said, the second such raid during a fragile four-month ceasefire.Lebanon's leaders condemned the attack,

Beirut’s southern suburbs were rocked by an overnight Israeli airstrike that killed at least four people, according to Lebanon’s health ministry. Israel says the strike was targeting a Hezbollah militant with links to Hamas,

Israeli operations in Lebanon continued on a near-daily basis last week. On Friday, Israel struck in Dahiyeh, Beirut for the first time since the November 27 ceasefire, destroying a Hezbollah drone storage facility.

The airstrike came without warning days after Israel launched an attack on the Lebanese capital, Beirut, on Friday for the first time since a ceasefire ended fighting between Israeli forces and the Hezbollah militant group in November.

An Israeli strike Tuesday killed three people, Lebanon said, as a source close to Hezbollah said one of the group's officials was targeted in the second such strike on south Beirut during a fragile four-month ceasefire.

Battered in the war with Israel, Hezbollah is under pressure - even from its supporters.