The measure came after a riot at the Moldavanovka prison yesterday in which a parliamentarian was killed as he made an inspection of the facility.
Prisoners, some of them ill with tuberculosis, were demanding better living conditions.
Parliament met in an emergency session today to discuss the killing of parliamentarian Tynychbek Akmatbaev.
Prime Minister Feliks Kulov said it appeared Akmatbaev was shot with a gun he or one of his bodyguards brought to the prison.
"We can't say anything definite about the weapons that were seized [after the riot] yet," Kulov said. "We need some more time to check them. But the fact remains that they [the deputy's bodyguards] came in with guns. They did not give up their weapons [to prison authorities]."
Other reports have indicated that officials demanded that the visitors surrender their weapons, which they did, but prisoners then stole the guns from prison guards.
The situation was defused when Kulov arrived and convinced them inmates to stop the riot and hand over the bodies of those killed.
(RFE/RL's Kyrgyz Service)