The military struck Hezbollah targets in Lebanon after troops were fired upon from across the border, the military said early Wednesday, after announcing a "security incident" at the border late Tuesday evening.
No soldiers were hurt, the army said. The strikes used helicopters and planes to target observation Hezbollah posts, it added.
Residents in Upper Galilee communities were temporarily instructed to remain in their homes in the evening before being told they could leave after about an hour. Some roads were temporarily closed.
The military fired illumination flares across the border during the night as it attempted to rule out the possibility of militants crossing the border, finding no evidence of a breach in the fence.
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In a tweet, Prime Minister Benjamin Netanyahu said: “Israel takes the shooting at our forces by Hezbollah very seriously. We will not tolerate any aggression against our citizens and will respond forcefully to any attack against us.
“I advise Hezbollah not to test Israel's crushing [military] force. Hezbollah is once again endangering Lebanon because of its aggression,” he added. Netanyahu met with the defense minister, IDF chief of staff, and other defense officials over the course of the night.
The incident came days after an Israeli drone crashed in Lebanon during operational activity on Saturday, with the military saying there was no fear that any intelligence had been compromised.
Last month, the military said it had stopped an attempted attack by Hezbollah operatives trying to cross the border into Israel. A probe of the incident suggested that the operatives managed to get within 50 meters of a military post, but fled after troops shot toward them.
That incident came after the Iran-backed Lebanese Shi'ite group vowed to avenge the death of one of its fighters, who was reportedly killed in an airstrike on pro-Iranian militants in Syria that a war-monitoring group attributed to Israel.