"We acknowledge this is an act of terror," said interior minister Kalmukhanbet Kasymov.
"We have moved to guard all (strategic) sites," he said Monday.
The bloodshed, which happened on Sunday, saw gunnies hijack a bus as part of attacks on two weapons stores and a military base in the western city of Aktobe.
The violence, which killed three civilians and three soldiers, sparked a massive police manhunt.
Eleven gunnies were killed by government forces in total with the interior ministry saying they were believed to be "religious radicals".
It was unable to confirm reports of a fresh Monday shootout just outside the city.
Kazakhstan's parliamentary speaker also on Monday classified the attacks that began on the eve of the holy month of Ramadan as "acts of terror".
Russian President Vladimir Putin
...Second and fourth President and sixth of the Russian Federation and the first to remain sober. Putin is credited with bringing political stability and re-establishing something like the rule of law, which occasionally results in somebody dropping dead from polonium poisoning. Under Putin, a new group of business magnates controlling significant swathes of Russia's economy has emerged, all of whom have close personal ties to Putin. The old bunch, without close personal ties to Putin, are in jail or in exile or dead...'s front man Dmitry Peskov said Russia was confident Kazakh security services are "effectively controlling" the situation in the country.
Currently the Kazakh government has given no details about which group may have been involved in the attacks.
Gun shops were shuttered in key cities across Kazakhstan Monday, local media reported, although the ministry said the situation in Aktobe was stable.
Despite increased security on the streets, public transport was operating as normal.