Explosions were heard in Tehran early Wednesday as Israeli warplanes pounded Iran’s capital overnight and into Wednesday. Iran launched a small barrage of missiles at Israel with no reports of casualties.

For nearly six nights, sirens have blared across Israel warning of retaliatory Iranian strikes. While Israel is able to inflict far greater pain on Iran, it has not been immune to destruction and death.

Foreign Ministry spokesman Esmail Baghaei delivered the warning in an interview with Al Jazeera English, saying “any American intervention would be a recipe for an all-out war in the region.”