An Israeli strike killed a commander of Hezbollah's elite Radwan force in south Lebanon on Monday, according to security sources familiar with the group's operations in the country.
It's one of the most high-profile attacks on its senior officers in three months of hostilities with Israel.
Wissam Al Tawil, the deputy head of a Radwan unit, and another Hezbollah fighter were reportedly killed when the car they were in was struck in the village of Majdal Selm, some 6 km from the border.
One of the security sources called Tawil's death "a very painful strike". Another said, "things will flare up now."
Hezbollah says its campaign aims to support Palestinians in the Gaza Strip. The hostilities between the group and Israel have largely been contained to areas near the border.
Tensions spiked higher last week when an Israeli strike killed deputy Hamas chief Saleh al-Arouri in Beirut's southern suburbs, an area controlled by Hezbollah. Israel has neither confirmed nor denied its responsibility for that attack.
Hezbollah on Saturday said it had hit a key Israeli observation post with 62 rockets as a "preliminary response" to Arouri's killing.
US President Donald Trump and the leaders of Greenland and Denmark signed an agreement on Tuesday that permits a larger US military presence on Greenland and may resolve a standoff over the strategically located and mineral-rich island.
An F-16 fighter jet assigned to the US air base Spangdahlem in western Germany crashed on Tuesday, the US military said, adding that one pilot had ejected safely and was receiving medical treatment.
US President Donald Trump on Tuesday called for complete economic isolation of Iran, showing no intention to resume talks at the UN General Assembly but saying he believed a deal would be done after the US midterm elections in November.
Donald Trump is set for a whirlwind schedule of meetings with leaders from four continents at the UN General Assembly on Tuesday, against the backdrop of the wars in Ukraine and Iran that show no signs of abating.
A student opened fire in front of their high school in Turkey's western province of Manisa early on Tuesday, wounding at least 11 other pupils, Justice Minister Akin Gurlek said.