Hundreds of thousands of people have taken part in a march in the Argentine capital, Buenos Aires, to mark one month since the death of prosecutor Alberto Nisman.
The protest was called by federal prosecutors and attended by Mr Nisman's family and opposition politicians.
They defied torrential rain to demand justice for Mr Nisman, who had been investigating the government.
The prosecutor was found dead in his apartment on 18 January.
It is still not clear whether he killed himself or was murdered.
Mr Nisman was investigating Argentina's deadliest terrorist attack, the 1994 bombing of the Amia Jewish centre.
The silent march was called by prosecutors demanding a full investigation.
Mr Nisman's ex-wife, federal judge Sandra Arroyo Salgado, and their two daughters joined the demonstration, which lasted nearly two hours.
Similar protests took place across the country.
Argentines living in Spain, France, Israel and other countries also gathered to demand justice for Mr Nisman.
Officials have denounced the march as a political move to weaken the government.
Mr Nisman was found with a bullet wound to the head and a gun was lying next to him.
Days earlier, he had published a 300-page report in which he accused President Cristina Fernandez de Kirchner and Foreign Minister Hector Timerman of covering up Iran's alleged role in the bombing.
His body was found just hours before he was due to appear before a congressional committee to present more details of his allegations.
News of his death and its timing led to speculation among some Argentines that the government may have played a role in it.
The government has strongly denied both allegations.
In an open letter published on her website, President Fernandez suggested rogue intelligence agents had fed Mr Nisman false information in order to destabilise her government.
She also said she was convinced Mr Nisman's death was not suicide.
Days later, she announced she planned to dissolve Argentina's intelligence service, SI.
Critics said the move was aimed at diverting attention away from Mr Nisman's death.
Earlier, President Fernandez and her cabinet attended an unrelated event at the Atucha power plant, in the city of Zarate, 90km (55 miles) north of the capital.
Ms Fernandez said she would not bow to internal or external pressure and would remain in office until December, when her term ends.
"This government will not allow anyone else to impose their rules on us," she said in a speech that was broadcast on national television.