Israel launched airstrikes early Saturday targeting what it described as military targets in Iran in retaliation for a ballistic missile assault Oct. 1, officials said. There was no immediate information on damage in the Islamic Republic.

"The regime in Iran and its proxies in the region have been relentlessly attacking Israel since Oct. 7 — on seven fronts — including direct attacks from Iranian soil," an Israeli military statement said. "Like every other sovereign country in the world, the State of Israel has the right and the duty to respond."

Israel's military described the attack as "precise strikes on military targets in Iran," without immediately elaborating.

In Tehran, the Iranian capital, the sound of explosions could be heard, with state-run media there initially acknowledging the blasts and saying some of the sounds came from air defence systems around the city.

A Tehran resident told The Associated Press that at least seven explosions could be heard, which rattled the surrounding area. The resident spoke on condition of anonymity for fear of reprisals.

Meanwhile, state media in Syria described its air defences as targeting "hostile targets" there as well.

Iran has launched two ballistic missile attacks on Israel in recent months amid the ongoing Israel-Hamas war in the Gaza Strip that began with the Hamas attack on Israel on Oct. 7, 2023. Israel also has launched a ground invasion of Lebanon.

The strike happened just as U.S. Secretary of State Antony Blinken was arriving back in the U.S. after a tour of the Middle East where he and other U.S. officials had warned Israel to tender a response that would not further escalate the conflict in the region and exclude nuclear sites in Iran.

White House National Security Council spokesperson Sean Savett said in a statement that "we understand that Israel is conducting targeted strikes against military targets in Iran" and referred reporters to the Israeli government for more details on their operation.