The Iron Dome missile defense system intercepted three rockets headed for the southern city of Eilat late Wednesday night, while a fourth fell in an open area, the army said.

This fourth rocket was not shot down by the missile defense battery as it was headed towards an open field, a military spokesperson said.

There were no injuries or damage reported from the rocket salvo. However, city officials said that five people were treated for anxiety attacks related to the incident. One of them was taken to the hospital, the Magen David Adom ambulance service told Israel Radio.

The rockets were fired from the Sinai Peninsula in Egypt, according to the Israel Defense Forces.

There were no immediate claims of responsibility, but the Islamic State affiliate Ansar Bait al-Maqdis — formerly known as Wilayat Sinai — has been waging a bloody battle with Egyptian forces in the peninsula.

Army and police forces began searching the area for signs of debris, police said.

Fragments of one of the rockets were reportedly found in a hotel swimming pool, according to pictures posted to social media.

Residents described the wail of air raid sirens before several loud explosions.

Shortly after the rockets were intercepted, head of the IDF Southern Command Maj. Gen. Eyal Zamir told the mayor of Eilat, Meir Yitzhak Halevi, that the city could return to its routine, Army Radio reported.

“When there is a successful interception the city returns to routine quickly, as people understand that the city is protected,” Itsik Alfasi, a senior Eilat police officer told Israel Radio.

Eilat is a Red Sea resort city, popular with tourists from Europe. The city is currently full to capacity with visitors.

The last rockets fired at Eilat from the Sinai Peninsula were launched during the 2014 summer war between Hamas and Israel in the Gaza Strip. The two projectiles struck in the center of the city, hitting a car and causing light injuries to seven people.

Hours before Wednesday’s attack, a mortar shell struck the Golan Heights, at Israel’s northern tip, causing neither damage nor injury.

In response, the army shelled a Syrian military position in the northern Golan Heights, the army said.