VI. ARREST AND SURRENDER OF ACCUSED
ARREST
Article 31
(2) The police shall, acting under the request of the International Criminal Court arrest the accused - person whose arrest and surrender or temporary arrest or surrender has been requested by the International Criminal Court and shall with no delay bring the person before the investigating judge of the competent court for the execution of the surrender procedure. If the accused is on the run, the police shall conduct the necessary measures within their competence to find and arrest the person accused.
Provisional arrest
Request for provisional arrest
Provisional arrest for ICC proceedings - national procedures
EDIT.