Iran and Israel, regional arch-foes, are trading attacks and threats — the latest of which saw Israel launch a "limited military strike" on Iran in the early hours of Friday morning, a source familiar with the situation told NBC News. Iranian media reported three drones were shot down over the central city of Isfahan, while Israel's government has not commented. The region has been on edge, awaiting an Israeli reprisal after Iran sent more than 300 missiles and drones into the Jewish state at the weekend – the first ever direct Iranian attack into Israeli territory – which was largely intercepted by Israel's air defenses and caused no deaths. Tehran said the strikes were in retaliation for Israel's bombing of an Iranian diplomatic compound on April 1 that killed two senior Iranian generals, amo