Iran launched a fresh series of missile attacks on Israel, setting off air raid sirens nationwide, on Monday morning. Emergency services reported at least three deaths and numerous injuries on the fourth day of conflict between the regional adversaries,

The retaliatory strikes came on Saturday, a day after Israel killed top Iranian military leaders and scientists and destroyed an aboveground nuclear enrichment plant near Natanz.

The latest salvo comes after a weekend of escalating tit-for-tat attacks between Israel and Iran that raised fears of a wider, more dangerous regional war.