Subject + 拘留 + (了) + Object
The verb 拘留 (jūliú) means 'to detain' or 'to hold in custody.' It combines 拘 (to arrest, to restrain) with 留 (to keep, to hold). It describes the act of authorities holding someone, typically for a limited period, pending investigation or legal proceedings.
警方已经拘留了三名犯罪嫌疑人。
Jǐngfāng yǐjīng jūliú le sān míng fànzuì xiányírén.
The police have detained three criminal suspects.
他因为醉驾被拘留了十五天。
Tā yīnwèi zuìjià bèi jūliú le shíwǔ tiān.
He was detained for fifteen days for drunk driving.
嫌疑人被拘留后,案件进入了调查阶段。
Xiányírén bèi jūliú hòu, ànjiàn jìnrù le diàochá jiēduàn.
After the suspect was detained, the case entered the investigation phase.