It depends how this question is read.
The city of Tehran is Iran, not Syria.
If the term "Tehran" is used as a euphemism for Iranian government involvement in a foreign country, the same way that "Washington" is used as a similar euphemism (i.e. Washington began supporting the rebels on June 18th.), then, Yes, Tehran is actively involved in the Syrian Civil War, supporting Hezbollah and financially backing the Assad regime.
tehran,turkey,iran,iraq,isreel,yemen,syria,jordan,u.a.e,kuwait and oman
Each section of Tehran have dedicated Zip Code, it's too big for having a single zip code
Israel is next to Syria and Jordan too.
tehran is a city in iran. The Iranian capital Tehran.
Tehran is a city, it does not have a capital. However, the city of Tehran is the capital of Iran.
Tehran , Mashhad , Esfahan , Tabriz , Karaj , Shiraz
Tehran is the capital of Iran.
Tehran was created in 1906.
Tehran is the capital city of the Islamic Republic of Iran.
Naft Tehran is a football club found in Iran at the city of Tehran.
Tehran.
Tehran County's population is 7,882,843.