BBC
Brazilian investigators will fly to London next week for talks with their British counterparts over the shooting of Jean Charles de Menezes by police.
Brazil wants the Independent Police Complaints Commission (IPCC) to clarify conflicting reports of how Mr Menezes died at Stockwell station on 22 July.
Investigation papers leaked to the media this week seemed to contradict the police version of events.
Despite pressure, Met Police chief Sir Ian Blair has said he will not resign.
The IPCC has said Scotland Yard "initially resisted" its attempts to launch an investigation into the shooting.
Graphic images
Mr Menezes was shot after police mistook him for a suicide bomber. The incident came a day after the failed 21 July attacks on the London Underground and a bus.
Graphic photos of Mr Menezes' dead body lying on the floor of the Tube train have appeared in most of Brazil's newspapers.
The papers also reported claims from the leaked documents that the Brazilian electrician had not fled from police as initially claimed, nor had he hurdled a ticket barrier.
A statement from the Brazilian Foreign Ministry on Thursday night said the press coverage had heightened the government's sense of indignation at the shooting.
As a result, two top judicial officials would fly to London next week to meet members of the IPCC.
Significant shift
The Brazilian government wants an explanation as to how the two versions could differ so dramatically.
BBC's Brazil correspondent Tom Gibb said the move was a "significant shift" in the government's position.
Officials in the South American country had said they would wait for an end to the British investigation before commenting.
The move comes as the Met Police handling of the incident is subject to scrutiny in the UK, with claims Scotland Yard tried to delay the IPCC inquiry.
IPCC deputy chairman John Wadham said: "[Scotland Yard] initially resisted us taking on the investigation - but we overcame that. It was an important victory for our independence."
Sir Ian Blair has strongly defended his actions and those of his officers in the aftermath of the shooting.
He told the BBC: "At that stage I and my officers thought the dead man was a suicide bomber and we were in the middle of the biggest counter-terrorist operation."