Iran’s foreign minister on Friday said Tehran was investigating an overnight attack on Iran, adding that so far a link to Israel had not been proven as he downplayed the strike.

Iranian Foreign Minister Hossein Amirabdollahian told NBC News the drones took off from inside Iran and flew for a few hundred meters before being downed, Reuters reported.

“They’re … more like toys that our children play with, not drones,” Amirabdollahian said.

“It has not been proved to us that there is a connection between these and Israel,” he said, adding that Iran was investigating the matter but that media reports were not accurate, according to Tehran’s information.

Iranian media and officials described a small number of explosions, which they said resulted from air defenses hitting three drones over Isfahan in central Iran in the early hours of Friday. They referred to the incident as an attack by “infiltrators”, rather than by Israel, obviating the need for retaliation.

Amirabdollahian warned that if Israel retaliated and acted against the interests of Iran, Tehran’s next response would be immediate and at maximum level.

“But if not, then we are done. We are concluded,” he said.

The attack appeared to target an Iranian Air Force base near the city of Isfahan, deep inside the country, but without striking any strategic sites or causing major damage.

Israel has said nothing about the incident. U.S. Secretary of State Antony Blinken said the United States had not been involved in any offensive operations, while the White House said it had no comment.

Israeli missiles have hit a site in Iran, ABC News reported late on Thursday, citing a U.S. official, while Iranian state media reported an explosion in the center of the country, days after Iran launched a retaliatory drone strike on Israel, Reuters reported.

Reuters could not immediately confirm the reports.

Iran’s Fars news agency said an explosion was heard at an airport in the central city of Isfahan but the cause was not immediately known. Iran suspended flights over the cities of Isfahan, Shiraz and Tehran, state media reported.

Several Iranian nuclear sites are located in Isfahan province, including Natanz, centerpiece of Iran’s uranium enrichment program, read the report.

Tehran’s Imam Khomeini International Airport was closed to all flights until 0700 GMT, according to a notice to airmen posted on a U.S. Federal Aviation Administration database.

Some Emirates and Flydubai flights that were flying over Iran early on Friday made sudden sharp turns away from the airspace, according to flight paths shown on tracking website Flightradar24.

Israel had said it would retaliate, opens new tab against Iran’s weekend attack, which involved hundreds of drones, opens new tab and missiles in retaliation for a suspected Israeli strike on its embassy compound in Syria. Most of the Iranian drones and missiles were downed before reaching Israeli territory.

Analysts and observers have been raising concerns about the risks of the Israel-Gaza war spreading into the rest of the region.

Iran told the United Nations Security Council on Thursday that Israel “must be compelled to stop any further military adventurism against our interests” as the U.N. secretary-general warned that the Middle East was in a “moment of maximum peril.”

Oil prices and jumped on the reports of the Israeli strike. Brent crude futures rose 2% to $88.86 a barrel, the dollar gained broadly, gold rose 1% and S&P 500 futures dropped 1%, Reuters reported.

Israel’s assault on Gaza began after Palestinian Islamist group Hamas attacked Israel on Oct. 7, killing 1,200, according to Israeli tallies. Israel’s military offensive has killed over 33,000 Palestinians in Gaza, according to the local health ministry.

Iran-backed groups have declared support for Palestinians, launching attacks from Lebanon, Yemen and Iraq, read the report.

Ismail Haniyeh, leader of the Palestinian Islamist group Hamas, will travel to Turkey at the weekend to hold talks with President Tayyip Erdogan, while Ankara’s top diplomat met the Hamas leader during a visit to Doha on Wednesday, Reuters reported.

Turkey, a NATO member, has denounced Israel’s offensive in Gaza and called for an immediate ceasefire. Erdogan has called Hamas a “liberation movement” while slamming the West for what he calls their unconditional support of Israel. Ankara has imposed trade restrictions on Israel.

“I will host the leader of the Palestinian cause at the weekend. We will discuss a number of issues,” Erdogan told lawmakers from his AK Party in parliament.

Haniyeh’s visit to Istanbul will be his first trip to Turkey since Israel began its campaign in Gaza on Oct. 7. It also comes amid escalating regional tensions, after Iran attacked Israel at the weekend in response to an Israeli strike on the Iranian embassy compound in Damascus on April 1.

Erdogan said on Tuesday that Israeli Prime Minister Benjamin Netanyahu and other Israeli leaders were solely responsible for the regional crisis, read the report.

In Doha, Turkish Foreign Minister Hakan Fidan met Haniyeh to discuss humanitarian aid to Gaza, ceasefire efforts and talks on hostages. Hamas said in a statement it had conveyed its views on the ceasefire negotiations and its requirements, while reviewing “the importance and centrality of the Turkish role”.

Speaking later at a press conference alongside Qatari Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani, Fidan said the risk of a wider regional conflict persisted amid the Iran-Israel tensions, adding that countries which supported Israel should revise their positions.

TWO-STATE SOLUTION

He added that unity among Palestinians was needed to achieve a sovereign Palestinian state and two-state solution, and that he had conveyed Turkey’s position regarding a ceasefire in Gaza during his nearly 3-hour meeting with Haniyeh.

“We see that many actors in the West who are sympathetic to this, who want to support this idea (two-state solution) have concerns about Hamas,” Fidan said, adding that Israeli “propaganda” portraying Hamas as a terrorist group had exacerbated concerns about the group in the West.

“We exchanged views on their (Hamas’) need to openly share what sort of views, what sort of expectations they have within the solution leading to a Palestinian state to alleviate these perceptions.”

Fidan said Hamas had previously vowed to shut down its armed wing if a Palestinian state in line with 1967 borders were established, adding the group would then continue only as a political party. He said this was repeated to him during his talks on Wednesday, read the report.