Australia's Deputy Prime Minister Barnaby Joyce said on Thursday that he'd tested positive for COVID-19 while in Washington DC on an official visit., according to a statement. 

"Remaining members of the delegation have tested negative. Mr Joyce will remain in isolation until further notice," the statement read.  

Joyce, who is fully vaccinated, said he had been experiencing mild symptoms.

Before arriving in the US, he'd travelled to London and met with top officials as part of a 10-day trip.

It wasn't immediately clear what variant of the virus Joyce had contracted. 

Joyce said he believed he had been infected while visiting the UK but he had returned negative tests before leaving for the U.S., according to British media.