“I think we cannot underscore enough the risks of escalation in Lebanon and the region,” Mr Dujarric added.
Lebanese foreign minister said the attack had escalated tensions between his country and Israel, stressing that Lebanon would retaliate.
The Iranian-backed Lebanese Hezbollah militia has also repeatedly attacked Israel with drones since the beginning of the Gaza war almost 11 months ago.
Lebanon’s National News Agency (NNA) said an Israeli drone struck a house in the town of Aita al-Jabal with two guided missiles, killing two people.
Hezbollah on Monday claimed several attacks on Israeli troops and military positions in northern Israel, including a drone strike on a base and an attack on Israeli soldiers.
A large-scale barrage by Hezbollah on Israel, perhaps in coordination with an attack by Iran, has been expected for days.
“If Hezbollah continues its aggression, Israel will fight it with all its might,’’ Mr Gallant said
As tensions rise and Western leaders warn against an expansion of the Middle East conflict, Hezbollah said it is preparing for a possibly severe Israeli attack.
A commander in the Lebanese Islamist group al-Jamaa al-Islamiya, an ally of Hamas, was killed in an Israeli drone strike in eastern Lebanon.
Israeli forces have been waging an intense military offensive in the Gaza Strip for seven months.
