The government of Iran just released from custody two Chinese nationals who were arrested for taking pictures of a military complex in the town of Arak.
The Chinese foreign ministry said: "In early July, two people from Chinese companies mistakenly took some pictures of some sensitive buildings when they were helping local owners to conduct field measurements in Iran.
"They were detained by Iranian police and now they have been freed. The foreign ministry and Chinese embassy in Iran have warned Chinese citizens in Iran to behave so as to prevent misunderstandings."
Indeed. It's always good to prevent these misunderstandings.