|The blast took place outside the local headquarters of the Kazakhstan National Security Committee (KNB)|
ALMATY (AFP)— A suicide bomber Tuesday blew himself up outside the headquarters of the security service in the northwestern Kazakh city of Aktobe, causing casualties, the Interfax-Kazakhstan news agency said.
"A suicide bomber detonated an unknown device in front of the regional security services building. As a result of the explosion, there are casualties," a source within the security services told Interfax.
News reports said the security police were searching for alleged accomplices and had cordoned off a block of the city of 277,000 inhabitants.
However no official information was available from law enforcement and security services and Kazakhstan tightly-controlled state television has yet to broadcast any reports on the event.
The prosecutor's office is to give a briefing later in the afternoon.
Such an attack is a hugely rare event in Kazakhstan, the most stable state in Central Asia which has been run since even before the fall of the Soviet Union by strongman President Nursultan Nazarbayev.
Aktobe is a city in northwestern Kazakhstan, near the border with Russia. The blast took place outside the local headquarters of the Kazakhstan National Security Committee (KNB), the successor to the Soviet-era KGB.