The Israel Defense Forces said in a statement that Iran has launched further strikes against Israel.

"Defensive systems are operating to intercept the threat," the IDF said.

Israel conducted strikes in western and central Iran, the IDF said in a statement early Monday morning local time.

The IDF said it struck military targets.

Oil prices are higher Sunday as trading begins for the week, hours after Israel said it identified missile strikes from Iran.

U.S, oil is trading at $93.30 a barrel, up 3% and global oil is trading at $95.78, up 2.8%

The average price for a gallon of regular is $4.09, up $1.16 since the war started.

After a sharp selloff on Friday, stock futures are trading lower; Dow futures are down 199 points.

-ABC News' Zunaira Zaki

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

Secretary of State Marco Rubio spoke with Lebanese President Joseph Aoun and Israeli Prime Minister Benjamin Netanyahu regarding ongoing negotiations between the two countries, a U.S. official told ABC News, and as Israel expanded its offensive against the Iran-backed Hezbollah militia in southern Lebanon.

The U.S., the official said, proposed that Israel would refrain from escalation in the Lebanese capital Beirut in exchange for Hezbollah's halt of all attacks on Israel. That step, the official said, "would create space for gradual de-escalation and an effective cessation of hostilities."

Aoun "tried to advance this proposal and secure an agreement," the U.S. official said, but was stymied by Lebanese Parliament Speaker Nabih Berri -- the head of the Shiite Amal Movement and a longtime political ally of Hezbollah.

The official described Berri's response as "evasive and disappointing," and "placed the burden on Israel to stop shooting first."

"Hezbollah is following Tehran's lead. It clearly has no interest in the welfare of the Lebanese people. Iran wants to prolong the conflict in Lebanon so it can claim credit for 'saving the day,'" the U.S. official said.

"The United States does not expect Israel to absorb ongoing attacks on its civilians by a terrorist organization. The fastest way to de-escalate and protect civilians on all sides is for Hezbollah to stop firing immediately," the official added.

-ABC News' Shannon K. Kingston