有的媒体选择不报原因，要看原因看这个link

https://www.abc15.com/news/region-southeast-valley/tempe/arizona-state-university-students-denied-entry-to-us-over-alleged-academic-fraud

Sources close to the situation tell ABC15 that the students were in violation of their F1 student visas related to academic fraud. The sources said investigators apparently discovered evidence that the students were paying to have their school work completed for them, which is a violation of the F1 visa requirements and regulations. 

所有跟帖： 

• U.S. Customs and Border Protection would not say why。其它是不明“sourc -czhz- ♀ (0 bytes) () 09/02/2019 postreply 08:11:08

• 如果source是真的，CBP不将这样的事知会学校是不可思议的。 -czhz- ♀ (0 bytes) () 09/02/2019 postreply 08:13:04

• 移民局根本没义务知会学校啊：） --百科-- ♀ (101 bytes) () 09/02/2019 postreply 08:24:22