Fresh explosions were reported in the Iranian capital of Tehran on Sunday afternoon local time after Iran's president warned of "more painful and crushing responses" to Israeli strikes.Footage circulating online on Sunday afternoon Tehran time appeared to show smoke rising from buildings in several locations and at least one video of a burning car.

An Israeli strike near Iran's nuclear site caused an explosion and tremor, killing 5. Israel then hit all three major Iranian nuclear sites.

Loud blasts were heard Monday in western Tehran as a rapidly escalating air war between Iran and Israel raged for the fourth consecutive day.

Israel has reportedly carried out a pre-emptive strike targeting sites in Iran, according to Israeli media outlet Channel 12. The attack comes amid heightened regional tensions, with Al Jazeera reporting loud explosions in Tehran shortly after the strike. Axios also confirmed that air raid sirens were heard across multiple locations in Israel.