U.S. embassies across much of the Middle East urged Americans to increase their vigilance on Monday, citing a "complex security environment" and travel disruptions eight months into the U.S.-Iran war.

Embassies in the Gulf, Israel, Iraq, Lebanon and Jordan issued a security alert saying: "Americans currently in the Middle East should exercise heightened vigilance due to the complex security environment.

Israeli Prime Minister Benjamin Netanyahu vowed Monday that Israel will not hesitate to strike its enemies at a moment's notice, eight days before a tight election and following his warnings to Iran.

Netanyahu said he spoke to the commander of an unspecified base and saw Israel's "capability to strike our enemies the moment it is required."

Israeli police said they arrested 10 people on Monday in connection with a wave of settler violence that included attacks on a foreign journalist and European diplomats in the occupied West Bank over the weekend.

Israel had come under heavy international criticism for the attacks. Israeli police did not identify the suspects or specify their roles in the attacks, which came during a spike in settler violence during the annual Palestinian olive harvest season.

President Donald Trump on Sunday endorsed embattled Israeli Prime Minister Benjamin Netanyahu late in his reelection campaign, a coveted boost because of Trump's popularity but one that the American had withheld for months as the vote neared and the leaders' strategies in the Middle East diverged.

Trump said in a post on social media that Netanyahu "has been a Great Warrior Prime Minister, and an even greater Partner for Peace in combatting the Islamic Republic of Iran."

U.S. Vice President JD Vance — who participated in negotiations with Iran over the summer — has defended President Donald Trump's Iran strategy, and said the Trump administration is looking for a "final firm commitment from the Iranians that they're not going to rebuild their nuclear program."

U.S. President Donald Trump has predicted that the ongoing war with Iran will end “very quickly,” promising that American gas prices will fall below pre-war levels once hostilities cease.

Saudi Arabia said that it had intercepted a fresh wave of incoming drones, as its ally Egypt weighed sending the kingdom help in defending against repeated attacks from Yemen's Houthis.

Iran's Revolutionary Guards on Saturday said an oil tanker was on fire in the Strait of Hormuz after hitting a mine in the waterway at the heart of the Middle East war.

A tanker was struck by an "unknown projectile" off Saudi Arabia's Gulf coast, forcing the evacuation of its crew, a maritime monitoring agency said on Saturday.

Iranian President Masoud Pezeshkian denied that Tehran sought nuclear weapons, expressed readiness for dialogue and condemned U.S. sanctions during talks with Georgia's prime minister.