A shooting at the embassy of Azerbaijan in Tehran Friday left one killed and two injured. Baku called it a terrorist attack and announced plans to evacuate its diplomats and personnel from the embassy. 

What happened: Iranian police said a lone gunman entered the embassy with two children. He then shot and killed one person and injured two others. The attacker was arrested and told police that he was motivated by a family dispute, the official Islamic Republic News Agency reported. 

However, Azerbaijan's Foreign Ministry said an armed gunman broke through security. “The attacker broke through the guard post, killing the head of security with a Kalashnikov assault rifle,” the statement read.

Reactions: The Azerbaijani Foreign Ministry criticized Iranian authorities for failing to prevent what it called a terrorist attack, saying in a statement, “As the country where the embassy is located, the Iranian side had to fulfill its obligations under the Vienna Convention on Diplomatic Relations to ensure the security of the embassy and safety of its employees.”