Israel-Gaza-Lebanon updates: Netanyahu calls UN troops Hezbollah 'human shields'

Israeli Defense Minister Yoav Gallant has postponed Wednesday's planned Pentagon meeting, the Pentagon confirmed.

Pentagon spokesperson Sabrina Singh said at a briefing on Tuesday that the Israeli Ministry of Defense had "just informed" them that Gallant will be postponing his trip to Washington, D.C.

When asked why Gallant was postponing the trip, she said, "You'd have to speak to the Israelis on that one. I was just told that he postponed his trip."

Gallant was to discuss "ongoing Middle East security developments" during the meeting, the Pentagon had said.

-ABC News' Luis Martinez

The Israel Defense Forces claims to have killed at least 50 Hezbollah members, including six senior commanders, in "significant airstrikes" on Monday.

The IDF said it conducted a series of strikes on underground Hezbollah command centers in southern Lebanon.

Hezbollah has not commented on the IDF's strikes.

Israeli officials claimed Tuesday that their forces have killed the replacement for Hezbollah leader Hassan Nasrallah.

"We damaged Hezbollah's capabilities. We have eliminated thousands of terrorists, including Nasrallah himself, Nasrallah's successor, and the successor of Nasrallah's successor," Israeli Prime Minister Benjamin Netanyahu said in a video address on Tuesday. "Today, Hezbollah is weaker than it has been in many years."

Israeli Minister of Defense Yoav Gallant also said during a situation assessment on Tuesday that Nasrallah's replacement was "probably also eliminated."

"Hezbollah is an organization without a head," Gallant said. "There is no one to make decisions, no one to act."

Hashem Safieddine, a top Hezbollah official, was widely believed to succeed Nasrallah after the leader was killed in an Israeli airstrike last month.

Hezbollah has not commented yet on Israel's claims. Deputy Secretary-General Naim Kassem said earlier Tuesday that Hezbollah's "resources and capabilities remain in good shape."

"Our resistance on the front is cohesive and the administration is cohesive," he said in a video address delivered from an unknown location.

Hanan Balkhi, the regional director of the World Health Organization Eastern Mediterranean Regional Office, said Tuesday that 77 health workers have been killed and 74 others wounded by Israeli attacks since the beginning of October.

Health infrastructure has been "severely damaged," the WHO wrote on X, with the organization verifying 36 attacks on health facilities so far in October.