<sod >Police detained some protesters and tore down barricades on Kiev's central square early this morning during a heavy snowfall, in what could mark a more determined move against the demonstrators.< eod>< sod > Mr Azarov told state broadcaster Russia 24 yesterday evening: "If the provocateurs do not stop, then the authorities will have no other choice but to use force under the law to protect our people." Police stormed barricades on Kiev's central square, detaining some protesters at 6am (GMT) this morning during a heavy snowfall, in what could mark a more determined move against the demonstrators.< eod>