Two students and a safety officer hindered to the classrooms on the third floor by the man after he delivered a fourth hostage was identified as a teacher, a Reuters report.
"The man was holding a paper bag in her hand that she said contained explosives," said Dmitry Beryozin, a spokesman for police in the city near the Caspian Sea.
The man asked the police bring it food and drink but have yet to file charges, said Committee Investigators Russia in that area.
Russia news agencies reported earlier Thursday that their captors were armed with the gun man.
The man's motive is not yet known did the standoff and it is not clear whether it has something to do with the militant group.
The Kremlin is still trying to cope with muslim guerrillas in the North Caucasus, a decade after the federal troops in Chechnya separatists mendongkel dominance.
Suicide bombing attacks launched by a principal of the North Caucasus, killing 37 people in the most densely populated Russia Domodedovo Airport in Moscow in January 2011.
The attack was made the President of Russia Dmitry Medvedev was then fired a number of medium-level police officials and leading to Domodedovo pendongkelan senior managers.
The suicide bombing was claimed by Doku Umarov, the leader of the Caucasus Emirate.
United States incorporate the Caucasus Emirate to its list of terrorist groups because of the serangan-serangannya in an attempt to dislodge the Government from the North Caucasus region of Russia.
Violence flared in the North Caucasus, where muslim guerrillas are angry because of poverty and global jihad ideology driven by wanting to establish an independent State based on sharia law.
Dagestan, located on the shores of the Caspian Sea, has replaced its neighbouring territories as a center of violence in the North Caucasus who are muslim.
Dagestan borders Chechnya in the North Caucasus, where Russia is facing violent muslim hardliners, and a muslim province that is often hit by attacks targeting law enforcement officers and Government officials.
The attacks have made the Kremlin promised again to quell the guerrillas in the North Caucasus. The area hit by violence since two post-war Soviet happened in Chechnya between separatist guerrillas and Government forces.
The group human rights groups accused the authorities in the North Caucasus region of Russia--ranging from the Black Sea to the Caspian Sea--do major offences under the pretext of HUMAN RIGHTS to quell muslim militancy. (M014)
News; Finance; Insurance; Health; Cancer
News; Finance; Insurance; Health; Cancer; Car Insurance; Health Insurance
Mourners carry the coffin the opposition leader was killed when the funeral ceremony Chokri Belaid towards the cemetery of El-Jellaz, Jebel Jelloud, district of Tunis, Friday (8/2). Tens of thousands of mourners calling for anti-Islamist slogans during the funeral ceremony, killing Belaid make Tunisia sank into deeper political crisis.(REUTERS/Anis Mili)
Rune Stoltz Bertinussen / Scanpix / ReutersA general view of the Aurora Borealis, close to the city of Tromso in Northern Norway, on 25 January 2012.
