The incident comes a day after the U.S. said it shot down an Iranian drone.
Tehran warns Europe that unless Iran gets relief from U.S. sanctions, it will resume enriching uranium in violation of the nuclear deal.
China ranked number one.
President Hassan Rouhani made the remarks on live television.
“The danger is the potential for miscalculation, and it takes just one mistake. You can easily see the tit-for-tat and how it gets out of hand pretty quickly.”
U.S. officials are raising concerns that intelligence about Iran's plans to attack American allies was misinterpreted.
Lake Urmia was once the largest salt lake in the Middle East, but now it is set to vanish altogether
WARNING: Some people may find these images disturbing
Sarah Pannell's debut book 'Tabriz to Shiraz' challenges preconceived notions of life in Iran.
Prime Minister Justin Trudeau accused Beijing of "arbitrarily" applying the death penalty amid an escalating rift over the arrest of a Huawei executive.
“Oh, so like do you guys like still have slaves in Egypt? Do you have your own slave?”
A group of nine fans have travelled to the World Cup to protest against the rules banning women from stadiums back home during each of Iran’s matches.