Kazakh authorities said Wednesday they detained 1,678 more people in the past 24 hours over their alleged participation in the violent unrest that rocked the former Soviet nation last week, the worst since Kazakhstan gained independence three decades ago.

The additional detentions, reported by authorities in Almaty, the country’s largest city that was hit the hardest by the turmoil, brought the total number of arrests to about 12,000. More than 300 criminal investigations into mass unrest and assaults on law enforcement officers have been opened.