The Israeli military said on Tuesday four soldiers had been killed in combat in southern Lebanon where its forces are clashing with Iran-backed Hezbollah.
A military statement named three soldiers from the same battalion who "fell during combat" and a separate statement said another soldier, who had not yet been publicly named, had died in the same incident.
Another soldier was severely wounded and a reservist moderately wounded, according to the second statement.
Israel is trying to push Hezbollah militants, who have fired rockets and drones across the border, out of southern Lebanon in a campaign that Israeli officials suggest could become a prolonged occupation.
Three United Nations peacekeepers from Indonesia were killed in two separate incidents in southern Lebanon after a bloody weekend in which Lebanese journalists and medics were killed in Israeli strikes.
Two peacekeepers were killed on Monday after an explosion from an unknown origin destroyed their vehicle near Bani Hayyan in south Lebanon, the UN peacekeeping force UNIFIL said in a statement. Two other soldiers were wounded in the blast.
Another Indonesian soldier was killed overnight Sunday into Monday when a projectile exploded near one of the group's positions close to the southern Lebanese village of Adchit al-Qusayr. Another peacekeeper was critically injured at the time.
The death on Sunday was the first among the UN's peacekeeping force in the new war between Israel and Lebanese armed group Hezbollah which erupted on March 2.
Lebanon was pulled into the war in the Middle East when Hezbollah fired rockets at Israel in solidarity with Tehran, two days after Iran was attacked by Israel and the United States.
Hezbollah's attack prompted a new Israeli ground and air offensive. More than 1,240 people have been killed in Israeli strikes on Lebanon, according to Lebanese authorities.
They include more than 120 children, nearly 80 women and dozens of paramedics.
