Authorities in Central Asia's former Soviet "stans" are taking draconian measures to stamp out militant Islam, but their harsh methods and the absence of democratic politics risk provoking a backlash that could bring even greater instability.

While the region's authoritarian rulers have battled Islamic militancy throughout the quarter century since the Soviet Union broke up, the rise of the Islamic State group has brought what security services describe as a new, more dangerous threat.

Uzbekistan has banned beards, outlawed Islamic dress, shut restaurants that refuse to sell alcohol and warned teahouses not to celebrate the nightly end of the Ramadan fast with "Iftar" meals. In Kyrgyzstan, where the authorities vet preachers to ensure mosque sermons do not stir up unrest, there have been shootouts between the secret police and militants.