Tehran: In a concerning development, Iranian media reported fresh blasts in central Tehran on Sunday.

The Tasnim news agency shared footage of the explosion site, saying it occurred near the central Valiasr Square.

The video showed columns of smoke rising from the area, with debris and shattered glass scattered across the scene. Other media carried similar reports.

Iranian media said Sunday that the death toll from Israeli attacks on Friday and Saturday was at least 128, including women and children, reporting hundreds more wounded.

At least "128 people were martyred in these military attacks, and around 900 injured individuals were admitted to" hospitals, said Etemad daily, citing the health ministry.

The region braced for a protracted conflict after Israel's surprise bombardment of Iran's nuclear and military sites on Friday killed several top generals and nuclear scientists, and neither side showed any sign of backing down. Iran said Israel struck two oil refineries, raising the prospect of a broader assault on Iran's heavily sanctioned energy industry that could affect global markets.

The Israeli military, in a social media post, warned Iranians to evacuate arms factories, signalling what could be a further widening of the campaign.