The Heritage Foundation has filed a second lawsuit to obtain Prince Harry's immigration records, claiming he may have lied about drug use on his visa forms. The right-wing think tank is pursuing the release of the Duke of Sussex's paperwork after heavily redacted documents were released earlier this week by the Department of Homeland Security.

The Duke of Sussex is still in a visa row with a conservative think-tank who has been pushing for his visa documents to be made public.

Harry's visa status is being kept secret as publication could lead to "foreseeable harm," unsealed filings say.