Argentina's football association on Friday asked the company supplying the VAR technology being used at the Copa America to clarify whether Brazil President Jair Bolsonaro's security team interfered with Tuesday's semifinal.

Argentina lost 2-0 to hosts Brazil in front of the watching Bolsonaro at the Mineirao stadium in Belo Horizonte but were infuriated that they were denied two penalty claims that replays suggested should have been given.

And what angered them most was that Ecuadoran referee Roddy Zambrano refused to consult VAR to check the validity of their claims.

"We're very concerned that Brazilian media and news websites are talking about possible problems and interference in the system of communication between the VOR (video operating room) and the field officials," said the AFA federation on its website.

It's the second complaint made by AFA about the semifinal having protested on Wednesday to South American football's governing body CONMEBOL over "serious and gross refereeing errors".

"According to the aforementioned versions, this interference was caused by President Jair Bolsonaro's security teams," said the statement, which was signed by AFA's refereeing director Federico Beligoy.

On Wednesday, the Brazilian website Globoesporte.com reported that there had been a problem with VAR before the semifinal match, claiming a "radio signal used by” Bolsonaro's security team affected the referee's communication channel with the VAR team.