Azerbaijan's embassy in Tehran has resumed work more than a year after a deadly attack that soured ties between the two neighbours, Iranian state media reported.The official IRNA news agency on Monday announced the reopening of the embassy in a new location "following the negotiations between the Islamic Republic of Iran and the Republic of Azerbaijan".It added that the Azeri ambassador and diplomats had also returned to Iran.In January 2023, a gunman stormed into Baku's embassy in Tehran, killing a diplomat and wounding two embassy security guards.Iran's foreign ministry spokesman Nasser Kanani said Tehran strongly condemned the attack, stating the motivations behind it were "personal".The Azerbaijani foreign ministry, however, blamed Iran for the shooting, with spokesman Ayxan Hacizada saying an anti-Azerbaijani campaign had "encouraged the attack".In April 2023, Azerbaijan's foreign ministry said it had notified the Iranian ambassador that four employees of the Iranian embassy were declared personae non gratae.Iran followed suit by expelling four Azerbaijani diplomats a month later."Iran has taken appropriate measures to ensure security in front of our new embassy building in compliance with its obligation on diplomatic protection," the Azeri foreign ministry said in a statement on Monday.Relations between the two countries have traditionally been strained, with the former Soviet republic a close ally of Iran's historical rival Turkey and Iran's arch-enemy Israel.Tehran also fears that Azerbaijani territory could be used for a possible offensive against Iran by Israel, a major arms supplier to Baku.