As U.S. and Israeli war planes pummel Iran with daily strikes, witnesses say that civilian deaths, damage to infrastructure and anxiety are mounting while security forces remain an intimidating presence on the streets.

Millions of Tehran residents spent another stressful night on Thursday-Friday as huge explosions shook the city and lit up the sky, making it impossible for many to sleep, correspondents said.

Israel and the United States insist they are focusing on military, police and administrative targets with high-precision munitions, seeking to undermine the Islamic Republic's clerical government that both sides would like to see fall.