Following the outbreak of major Israeli and U.S. military operations against Iran on Saturday morning, neighboring countries across the Middle East are now on high alert, with precautionary measures and potential impacts rapidly unfolding.

An Iranian official told media that all U.S. and Israeli interests in the Middle East are now legitimate targets.

Here is what we know so far:

Qatar: Qatar's Defense Ministry said it had downed all missiles targeting the country, Reuters reported citing Qatar's state news agency.

The U.S. Embassy in Qatar issued a shelter-in-place warning to American citizens, urging them to remain vigilant until further notice and alerting that missiles are about to be launched and strikes are imminent. Qatar hosts the largest U.S. military base in the region.

Bahrain: Loud explosions and smoke were reported at around noon Saturday in the Juffair area, home to a U.S. military base. It remains unclear if the base was directly hit.

Later in the day, Bahrain's National Communication Centre (NCC) confirmed reports of attacks targeting sites and facilities inside the kingdom. It said the attacks were launched from outside its territory.

UAE: Explosions were heard in Abu Dhabi, the capital of the United Arab Emirates, on Saturday, according to China Media Group. The UAE has closed parts of its airspace.

Saudi Arabia: Loud explosions were heard in capital Riyadh.

Lebanon: Lebanese prime minister said on Saturday his country refused to be dragged into war.

Iraq: Media reports indicate explosions were heard near Erbil airport in northern Iraq. Iraqi authorities announced the closure of the country's airspace on Saturday.

Syria: Syria said on Saturday its airspace was partially and temporarily closed, according to AFP.