An investigation has begun to see where improvements can be made and the museum is checking to see if any other objects have been taken.

目前，故宫博物院现在正在进行自查，查看是否还有地方需要改进安保措施，同时还在调查是否还有其他展品失窃。

youdao

Article 3 the inspection on exportation of products as mentioned in the present Measures shall include checking and investigation.

第三条本办法所称产品出口情况检查包括核查和调查。

youdao

Police said they would be checking Christina's profiles on social media websites as part of the investigation, but there was nothing to suggest she was being targeted.

BBC: Christina Edkins