ISTANBUL At least 503 people have been killed and about 5,700 others injured in US-Israeli attacks in the Iranian capital Tehran since late last month, the director of Tehran Province Emergency Services said Monday. Mohammad Esmail Tavakoli told the ISNA News Agency that most of those killed were civilians, including 12 children aged between two months and 12 years. The US and Israel have continued joint attacks on Iran since Feb. 28, killing so far around 1,300 people, including then-Supreme