设立路障 meaning in Chinese

set ua roadblock to

At about 1 am , police patrolling officers spotted some suspected illegal immigrants acting suspiciously at a barbecue site in st stephen beach , stanley . police officers from the emergency unit and uniformed branch were immediately deployed to set up roadblock and to conduct searches in the vicinity
今日凌晨约一时，巡逻警员在圣士提反湾的一个烧烤场地发现数名怀疑非法入境者形?可疑，于是通知冲锋队及其他军装人员在现场一带设立路障及搜索。