Israel Defense Forces (IDF) said it identified missiles launched from Iran toward Israel on Sunday and was activating its defensive systems to intercept the threat.

The Iran missile attack on Israel followed strikes carried out by the IDF this weekend on Iran-backed Hezbollah militant targets in southern Beirut, Lebanon.

The alleged missile attack aimed at Israel came just hours after Iranian lawmaker Ebrahim Rezaei promised a "decisive and painful response" to Israel’s airstrikes on southern Beirut on Sunday.

Rezaei, spokesman for the Security and Foreign Policy Committee of Iran’s Parliament, issued a statement on social media, threatening, "This rabid dog must be disciplined and put in its place. Look at the sky of the occupied territories tonight."

IDF sent out a precautionary directive to mobile phones of residents in the area targeted by Iran, asking them to act responsibly and follow instructions to save lives.

Upon receiving an alert, the public is being instructed to enter a protected space and remain there until further notice.

-ABC News' Jordana Miller and Claire Bower

Israel Defense Forces (IDF) announced on Sunday that its Military Police Criminal Investigation Division has opened an investigation into why an Israeli soldier opened fire on a Palestinian family's car in the West Bank, killing a 7-month-old and injuring his parents.

The incident occurred on Friday during operational activity in the city of Hebron's Judea Brigade area, according to the IDF.

"Based on the findings of the preliminary examination, it was decided to open an investigation by the Military Police Criminal Investigation Division. Upon its conclusion, the findings will be transferred to the Military Advocate General’s Office," the IDF said in a statement on Sunday.

The Palestinian Health Ministry identified the baby as Sam Fahd Abu Haikal, adding that his parents were also injured when an Israeli soldier opened fire on their vehicle.

In its initial statement about the incident, the IDF said troops “perceived a vehicle accelerating toward them,” prompting one of the soldiers to fire at the vehicle.

-ABC News' Claire Bower

Israeli military forces launched strikes against Iranian-backed Hezbollah military targets in southern Beirut, Lebanon, on Sunday, posing a dangerous moment for U.S.-Iran peace talks and an already tenuous ceasefire in the Persian Gulf region around the Strait of Hormuz.

Israel Defense Forces (IDF) said the strikes were occurring in Beirut and its suburbs. The strikes were in response to the Hezbollah militant group firing missiles into northern Israel.

"In accordance with the directives of Prime Minister Netanyahu and Defense Minister Katz, the IDF has now attacked terrorist headquarters in the Dachiyya neighborhood of Beirut, in response to Hezbollah firing into Israeli territory," Netanyahu and Katz said in a joint statement on Sunday.

Last week, Netanyahu said Israel would attack Hezbollah strongholds in southern Beirut. The IDF had issued evacuation orders for the area.

Sunday's strikes followed a heated phone call on June 1 between Netanyahu and President Donald Trump, who sources told ABC News was angered by Israel's escalation in Lebanon and its potential to imperil the administration's ongoing negotiations with Iran.

Before Sunday's strikes, Iran's Islamic Revolutionary Guard Corps (IRGC) warned in a statement on Iranian state media that if Israel were to strike Beirut, Iran would launch strikes against Israel. Iran, via state media, also threatened to stop negotiations with the United States.

-ABC News' Tom Soufi Burridge

U.S. forces again shot down Iranian one-way attack drones that threatened international maritime traffic in the Strait of Hormuz, U.S. Central Command said.

In a post on social media, CENTCOM said the U.S. military shot down two Iranian drones.

"American forces remain postured and ready to continue defending against Iranian aggression," the post stated.

On Friday, CENTCOM said the military shot down four Iranian drones that had been launched toward the strait and then also struck Iranian coastal surveillance radar sites in the city of Goruk and on Qeshm Island.

Speaking to reporters from the Oval Office on Thursday, President Donald Trump, for the first time, detailed a risky plan that he opted not to greenlight that would have sent U.S. troops into Iran to collect enriched uranium, or "nuclear dust" as he calls it.

The president said he decided not to go forward with the plan given the dangers.

Trump said the operation would have taken at least two weeks and also talked about the "massive equipment" that would need to be airlifted in.

The president added that the U.S. could still carry out such an operation, but also said that there's "no reason to" because the nuclear material is "entombed."

"We could get it right now," Trump said. "I don't think they could stop us if we wanted, but there's no reason to. It's entombed."

-ABC News' Nicholas Kerr and Michelle Stoddart