A spokesperson for the university has confirmed Ajjawi was not allowed to enter the country and said in a statement:
"The university is working closely with the student's family and appropriate authorities to resolve this matter so that he can join his classmates in the coming days."
While CBP agents will not comment on "specific information on individual travelers" due to privacy concerns, they said Ajjawi was "deemed inadmissible to the United States based on information discovered during the CBP inspection."
Exactly what the CBP's inspection entailed remains unclear, but officials said visa holders looking to enter the U.S. "must demonstrate they are admissible into the U.S. by overcoming all grounds of inadmissibility, including health-related grounds, criminality, security reasons, public charge, labor certification, illegal entrants and immigration violations, documentation requirements, and miscellaneous grounds."
Despite being turned away at the border, CBP agents stress Ajjawi was not deported, but rather was denied entry to the country. Legally, someone who has been deemed inadmissible can still reapply for a visa with the Department of State.
CBP officers have the authority to cancel visas under certain circumstances, while the Department of State had the authority to issue and revoke visas.
Classes at Harvard University are set to begin next week.