The Palestinian Islamic Jihad’s armed wing said on Monday that its commander in Lebanon was killed in Israeli strikes on Beirut’s southern suburbs.

In a statement, the Quds Brigades said Adham Adnan al-Othman, the head of the armed wing in Lebanon, was killed "as a result of the treacherous Zionist aggression that targeted the southern suburbs of Beirut, at dawn on Monday".

Hezbollah condemned on Monday the government's decision to ban its military activities, while Israel carried out retaliatory strikes in response to rockets fired by the Iran-backed group.

In a statement, Mohammad Raad, the head of the group's parliamentary bloc, condemned Beirut's "swaggering decisions", saying that "the Lebanese were expecting a decision rejecting the (Israeli) aggression".

The U.S. Embassy in Lebanon renewed its call for citizens to leave Lebanon immediately as the Middle East war expanded to Lebanon.

Several strikes hit Beirut's southern suburbs on Monday after Israeli evacuation warnings, as Israel attacked the country following Hezbollah's dawn missile launches.

Free Patriotic Movement leader Jebran Bassil on Monday warned against another “support war” in Lebanon, after Hezbollah fired rockets at Israel drawing massive Israeli retaliation.

“We warned against a war to support Gaza because it would only bring ruin to Lebanon and to those who waged it, and it would not be able to save Gaza, and so it was! We warn again against a war to support Iran because it will bring us more ruin without saving Iran. Neutralize Lebanon and leave it as a homeland for the Lebanese. It is not at the service of Iran or Israel,” Bassil said in a post on X.

Lebanese civilians fled from the country's south and from Beirut's southern suburbs on Monday, seeking refuge in schools in Lebanon's capital following a new and deadly escalation between Israel and the Iran-allied Lebanese militant group Hezbollah.

Lebanon's Health Ministry reported at least 31 people were killed and 149 wounded in overnight strikes in the Beirut suburbs and southern Lebanon.

The Israeli military said it killed the head of Hezbollah's intelligence services, Hussein Moukalled, in a strike in Dahieh overnight.

"The IDF now confirms that in a precise strike in Beirut last night (Sunday), the terrorist Hussein Moukalled, who served as the head of Hezbollah's intelligence headquarters, has been eliminated," the army said in a statement on Monday.

The Israeli army warned Monday of imminent strikes on several regions in east and south Lebanon and Beirut's southern suburbs.

"You are located near facilities and assets belonging to Hezbollah, where the (Israeli military) will act against them forcefully in the near term," the army’s Arabic-language spokesperson, Lieutenant Colonel Ella Waweya, said on X.

Israeli Defense Minister Israel Katz warned Monday that Israel would send Hezbollah chief Naim Qassem to "the bottom of hell" like Iran's supreme leader Ayatollah Ali Khamenei, after an attack by the Lebanese armed group.

"We will strike Hezbollah hard, and Naim Qassem, chairman of the Hezbollah terrorist organization, will discover that whoever follows Khamenei's path ends up like Khamenei -- at the bottom of hell," Katz said during a visit to the Israeli air force operations center.

Lebanon's government has decided on an "immediate ban" of Iran-backed Hezbollah's military and security activity, Prime Minister Nawaf Salam said Monday, in an unprecedented move as Israel retaliated to rocket fire.