Iran fired ballistic missiles at northern Israel on Sunday, the Israeli military said, in the first such attack since a cease-fire paused the U.S.-Israeli war with Iran two months ago.

Iranian officials had threatened to retaliate earlier on Sunday after Israel bombarded the southern outskirts of the Lebanese capital, Beirut, part of an Israeli campaign against the Iranian ally Hezbollah.

There were no immediate reports of casualties from the Iranian missile fire.

The United States and Israel attacked Iran in late February, waging a blistering air war for several weeks that killed thousands — mostly in Iran and Lebanon — and rattled the global economy. Iran responded by firing waves of ballistic missiles and drones at Israel and the U.S.’s Arab allies in the Persian Gulf.

Since early April, the three countries have been observing a shaky truce while President Trump seeks to reach a deal with Iranian negotiators to end the war. But the talks have yet to reach a breakthrough, despite Mr. Trump’s repeated pronouncements that an agreement could be imminent.