A major United Arab Emirates energy installation appeared to be hit on Saturday as the Gulf's petroleum facilities continue to be targeted with the US-Israel-Iran war showing no sign of abating.

Smoke rose from Fujairah, which is home to a major port and oil export terminal where Iranian attacks have already targeted an oil storage and trading hub. 

Iran's Islamic Revolutionary Guard Corps (IRGC) had informed the United Arab Emirates that US "hideouts" are "legitimate targets" after the US struck Iran's Kharg island.

It urged UAE residents and population centers to evacuate ports, docks, and US military areas to avoid being harmed.

Iran's Fars news agency, citing sources on Kharg Island, a crucial hub for Tehran, said there had been no damage to oil facilities after President Donald Trump said US strikes had destroyed only military targets there.

Trump had threatened in a social media post to target oil infrastructure on the island if Tehran continues to block the strategic Strait of Hormuz. 

Iran has, in turn, threatened to target US-linked oil infrastructure.

Israeli strikes in Lebanon

Palestinian group Hamas called on Iran to refrain from targeting neighboring countries, while affirming Tehran's right to defend itself against Israel and the United States.

Hamas, which fought a devastating two-year war with Israel in Gaza, also called on the international community to "work towards halting" the ongoing war immediately.

The Israeli army told people in an industrial zone in the west of Iran's northern city of Tabriz to leave ahead of military operations on Saturday.

Meanwhile, an Israeli strike hit an apartment building in a northern suburb of the Lebanese capital Beirut and targets in the country's south, local media said.

An overnight Israeli strike killed a dozen medical staff at a clinic in south Lebanon, health authorities said earlier on Saturday, after Iran-backed Hezbollah's leader Naim Qassem said his group was ready for a long confrontation with Israel.

Israeli strikes have killed at least 773 people in Lebanon since March 2, according to the health ministry.

French President Emmanuel Macron on Saturday said Lebanon was ready to engage in "direct talks" with Israel and offered to host negotiations in Paris.

"Everything must be done to prevent Lebanon from descending into chaos," Macron said. "Hezbollah must immediately halt its reckless course. Israel must abandon plans for a large-scale offensive and cease its massive air strikes."

Mass displacement

Since the start of the US-Israel attack on Iran, and the ensuing fighting between Hezbollah and Israel in Lebanon, a wave of displacement has unfolded across the region. 

According to a preliminary assessment, the UN Refugee Agency says up to 3.2 million people in Iran have been temporarily displaced due to the ongoing conflict. Most are reportedly fleeing from Tehran and other major urban areas towards the north of the country.

In Lebanon, authorities said more than 822,000 people have registered on the government's online displacement platform.

Displacement is taking place in Syria too, where local authorities say that more than 78,000 Syrians have entered from Lebanon since the escalation began. About 24,800 people have also crossed from Iran into Afghanistan since the start of the crisis.

Qatar's interior ministry said Saturday that it was evacuating a number of "key areas" as Iran presses its retaliatory air campaign against Gulf countries. 

Iran's cultural sites hit

Iran launched a fresh round of missiles towards Israel on Saturday in Tehran, but Israeli rescue workers said there were no reported casualties. 

Israel's military said it had identified missiles from Iran and "was operating to intercept the threat."

Iran's cultural heritage and tourism ministry said at least 56 museums and historic sites across the country had been damaged, as the war entered its 15th day. 

In Tehran, US-Israeli strikes damaged the UNESCO-listed Golestan Palace in the early days of the conflict, local media reported. The palace complex is one of the oldest sites in the Iranian capital and once served as the residence of the Qajar dynasty. 

The ministry said Tehran has recorded the highest number of damaged monuments, with 19 suffering varying levels of harm. 

UNESCO, the UN's culture agency, said it was concerned about hundreds of historic sites in Iran, Israel and Lebanon that have been damaged or threatened by the war.