Gunmen opened fire on Tuesday evening on a group of tourists visiting UNESCO heritage site in Russia's volatile North Caucasus region of Dagestan, killing one and injuring 11, local health authorities said on Wednesday.
The incident occurred near the fortress at Derbent, located on the Caspian Sea, north of the Azerbaijani border. Derbent Fortress was declared an UNESCO World Heritage site in 2003.
"As a result of a shooting by the fortress one person was killed and 11 were injured," a spokeswoman for the local branch of the health ministry, Tatyana Abdullayeva told AFP.
Five of the wounded tourists are in serious condition and are getting medical treatment, she said.
Police official Magomed Taymuradov said that security forces are searching for the suspects.
The leader of Dagestan, Ramazan Abdulatipov, told Russian media that the attack could have been conducted by "bandit groups" that "continue to take vengeance for the peace and tranquility the people of Derbent live in."