A court in Kazakhstan has jailed more than a dozen people for mounting mass riots in a western oil town last year at the end of a high-profile trial in the Central Asian nation.

Twelve people were sentenced to between three and seven years in jail Monday for their involvement in the unrest, during which at least 14 people died.

A further 16 people on trial were granted conditional sentences, five were amnestied and three were acquitted.

The unrest in Zhanaozen in December came after a seven-month long occupation of the main square by oil workers demanding higher salaries. A confrontation with police descended into rioting.

Five policemen were jailed last month after being found to have exceeded their authority in deploying live rounds against rioters.