Iran has carried out a barrage of missile attacks against Israel, hours after the United States attacked key Iranian nuclear sites.

Loud explosions were heard in coastal hub Tel Aviv and Jerusalem on Sunday shortly after the Israeli military reported incoming Iranian missiles and activated air defences.

Sirens rang in Israeli cities, with rescue services and media reports saying at least 20 people were injured.

Israeli police reported “the fall of weapon fragments” in an area near the northern port of Haifa, where local authorities said emergency services were heading to an “accident site”.

Tel Aviv, Haifa, and the southern city of Beersheba have been the three Israeli areas targeted by Iran frequently.

Reporting on missile strikes is subject to strict military censorship rules in Israel, where at least 50 impacts have been officially acknowledged nationwide and 25 people have been killed since the war started on June 13, according to official figures.

Iran has warned of “everlasting consequences” after President Donald Trump claimed the US attacks “obliterated” Iran’s nuclear facilities at Isfahan, Fordow and Natanz.

Meanwhile, Iran’s National Nuclear Safety System Centre and the United Nations nuclear watchdog, International Atomic Energy Agency (IAEA), say there has been no increase in radiation levels following the US strikes.