One security official has been shot dead and two guards wounded when an attacker armed with a Kalashnikov-style automatic rifle stormed Azerbaijan's embassy in Iran's capital, Tehran, RFE/RL reports.
"The attacker broke through the guard post, killing the head of security with a Kalashnikov assault rifle," Azerbaijan's Foreign Ministry said.
Iranian state TV quoted Tehran Police Chief Hossein Rahimi as saying the attacker was arrested and that he had "personal and family problems."
Rahimi said the attacker entered the embassy with two children. However, surveillance footage from inside the embassy released in Azerbaijan appeared to show the shooter entering the building alone. The footage bore a timestamp matching the Azerbaijan Foreign Ministry's statement.
Iran's Foreign Ministry spokesman, Nasser Kanaani, said Tehran strongly condemned the attack, which was under investigation with "high priority and sensitivity."
Iran and Azerbaijan have a common border. Relations between the two countries have been tense amid the conflict between Azerbaijan and Armenia over Nagorno-Karabakh.