Iran live updates: US blockade of Iran's Strait of Hormuz ports to begin Monday

The Israel Defense Forces said it began striking "Hezbollah launch sites in Lebanon."

"The IDF is at war. We continue to fight against Hezbollah with great intensity. Yesterday, we entered into a ceasefire in Iran, the IDF's achievements in the war against Iran are unprecedented and historic," the IDF general staff said Thursday.

The IDF added, "We are prepared to resume fighting with great determination if required at any given moment."

The Israel Defense Forces are warning other regions in Israel could come under fire from Hezbollah in the coming hours after dozens of rockets targeted the north on Thursday.

"In accordance with the situational assessment and following the launches from Lebanese territory since this morning, additional areas across the State of Israel may come under fire in the coming hours," the IDF said in a statement.

The IDF earlier told ABC News that Hezbollah had fired more than 50 rockets toward northern Israel on Thursday.

Israeli Prime Minister Benjamin Netanyahu said there is not a ceasefire in Lebanon in a recorded statement Thursday, saying strikes on Lebanon will resume.

"There is no ceasefire in Lebanon. We continue to strike Hezbollah with force, and we will not stop until we restore your security," he said, addressing Israelis in the north.

"After repeated requests from the Lebanese government to open peace negotiations with us, I instructed the cabinet last night to open direct negotiations with Lebanon in order to achieve two goals: One: disarming Hezbollah and the second: a historic and sustainable peace agreement between Israel and Lebanon," he said.

President Donald Trump said Israeli Prime Minister Benjamin Netanyahu will "ease up" Israel's strikes in Lebanon and be more "low key," in a phone interview with an Israeli journalist on Thursday.

This comes as Iran warned this morning that negotiations with the U.S. could be "meaningless" if Israel's attacks on Lebanon continue.

"Netanyahu is going to take a step back on the Lebanon issue," Trump reportedly said. "Netanyahu will be fine with Lebanon. He'll ease up a bit there. He has a problem with Hezbollah but he'll ease up and be totally fine."

This phone call took place before Netanyahu authorized direct talks with Lebanon to begin, according to the reporter.

In the Thursday phone interview, the president also expressed optimism over reaching a "very successful agreement," seemingly looking towards the U.S. and Iran talks that are scheduled to begin Saturday in Islamabad, Pakistan.

"We're going to have a very successful agreement. It's gonna be very good, everything's gonna work out very good," Trump said.

Trump claimed that Netanyahu is "on board" with the ceasefire agreement.

Netanyahu "supports the ceasefire agreement with Iran. He's totally fine with it," Trump said, according to the reporter.

ABC News has asked the White House about reports that say Trump had specifically asked Netanyahu to scale back Israeli strikes on Lebanon in a phone call between the two leaders Wednesday evening.