State TV back up and running in a few minutes according to the BBC
Iranian state TV is now back to broadcasting live after going off air for a few minutes following Israel's attack.
The broadcaster says in text being displayed on screen that all its programmes "are resuming live without any interruptions".
Another news ticker says Israel "in a brutal violation targeted one of the buildings of Iran’s state TV”.
The broadcaster says that Israel was trying to "silence the voice of truth" by attacking it.
Peyman Jebeli, head of the broadcasting, has just appeared on state TV showing a blood-stained paper. He says that the state TV and its employees are “standing until the end”.
Thousands work in something of a mini village that the state TV is based in. Israel had previously published a map showing a part of Tehran’s District 3 telling citizens to evacuate before the attack - and state TV was also included there.
The Israel Defense Forces (IDF) says in a statement that the air force targeted a "communication centre that was being used for military purposes by the Iranian Armed Forces".
It goes on to say the building was being used "under the guise of civilian activity" and that is strike "directly harmed the military capabilities of the Iranian Armed Forces".
"Prior to the strike, the IDF provided an effective advanced warning to the civilian population, including phone calls, and conducted the strike in a precise manner in order to mitigate harm to civilians as far as feasible."