Three people were killed when a rocket hit a residential building in the southern Israeli city of Be'er Sheva.
This was reported by the Israel Emergency Service.
The emergency services (MDA) reported that a man in his 40s, a woman in her 30s and a man in his 20s were seriously injured.
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Another six people were slightly or moderately injured, an MDA spokesman said.
Israel said Iran fired missiles after US President Donald Trump announced a complete ceasefire between the countries.
According to Iranian television, the ceasefire began after four waves of Iranian attacks on Israeli-occupied territories.
Iran Attacks Israel
Iran has fired at least six rockets into Israel in the past few hours.
Recall that earlier US President Donald Trump said that a ceasefire agreement had been reached between Iran and Israel. Explosions were heard in the hours before – and minutes after – the peace agreement between the warring countries, which the head of state had previously announced, came into force.