A New Jersey man is accused by the FBI as being a scout for Hezbollah, taking pictures of potential targets in New York, Washington, D.C. and Boston.
The threats come as the potential of a direct confrontation between Israel and Iran flares once more over the conflict in Syria.
Israel warned that Hezbollah's alleged cross-border attack tunnels originated from a Lebanese site "that we are going to expose in the very near future."
Speaking on the phone with Russian President Vladimir Putin on Monday, Netanyahu warned that Moscow's decision "will increase the dangers in the region" as it is "transferring advanced weapons systems into irresponsible hands."
Syrian President Bashar al-Assad blamed Israeli "aggression" for recent Russian military deaths. Meanwhile, Hezbollah's chief said the attack did not affect its rocket arsenal.
Iranian Defense Minister Amir Hatami said Syria and Iran had signed a new military cooperation deal as part of a reconstruction plan.
Israel purportedly rejected a previous plan that would have seen Iranian forces kept about 60 miles from its border.
Lebanon's economic minister endorsed a plan to export medicinal cannabis.
The Dimona facility is the oldest nuclear facility still working in the world.
Following the reports on Russia and Israel's agreement, a top Iranian general initially brushed aside the possibility of withdrawal.
The U.S.-led coalition battling ISIS has denied responsibility for the strikes.
Netanyahu announced Israel's per capita GDP had risen to $42,115—ranking Israel 24th in the world.
Netanyahu accused Iran of bringing some 80,000 Shiite fighters to Syria, from countries such as Afghanistan and Pakistan, to "convert" Sunni Muslims in Syria and launch attacks against Israel.
Assad also said that Russia does not dictate his government's actions.
"Israel is flaunting its power, and showing to all its high military superiority."
The U.S. may reportedly dismantle its Al-Tanf base in exchange for a withdrawal of both pro-Assad and anti-Assad militias, leaving the Syrian army in control.
French President Emmanuel Macron claimed, "If France wasn't listened to then there probably would be a war in Lebanon at this moment."
An Iranian Revolutionary Guards official said his forces were in Iraq and Syria legally, and "if anyone should leave the region, it would be the meddlesome U.S."
Secretary of State Mike Pompeo accused Tehran of using Iran deal funds to back the Lebanese Shiite Muslim Hezbollah, as well as the jihadi Sunni Muslim groups.
President Donald Trump has said the U.S. will leave a historic 2015 nuclear deal with Iran, a potentially destabilizing decision for the region.
An Israeli minister and Cabinet member said Syrian President Bashar al-Assad's continued support for Iran "will spell his end."
In order for Russia to extend its influence in Syria to Lebanon, it will have to mediate a greater conflict between Iran and Israel.
North Korea is an ally of Syria, Cuba and other fellow enemies of U.S. foreign policy, but peace may be on the horizon.
The spread of drone technology has allowed militant groups to build de facto air forces.
Hossein Salami, second-in-command of the Revolutionary Guards, told Israel, "There is no way for you but the sea."