The action mirrors a similar protest against femicides that mobilized thousands of women in 2015.
Messi made his return to action for Argentina on Thursday.
An Argentine judge has started an investigation into the death of Spanish poet and playwright Federico Garcia Lorca, who is believed to have been executed in 1936 by forces loyal to General Francisco Franco.
The Manchester City striker's father said he will retire if Messi does.
Lionel Messi will not be moving to the Premier League.
The Argentina forward announced his decision on Sunday after the Copa America final.
The Argentina legend has told compatriots to give Messi time to think.
Messi's team-mates have suggested he may change his mind.
The Argentina player retires from international football after team fails to beat Chile in Copa final.
Lopez allegedly hid $9 million in a monastery, was arrested and demanded cocaine in court.
The 'Dirty War," refers to a seven-year period when a military dictatorship cracked down on left-wing opponents.
China has not addressed allegations the boat was fishing illegally in Argentine waters.
Messi also said teammate Luis Suarez is the best attacker in modern football.
The new government won't appeal a court's decision to strike down a deal with Iran over investigating the 1994 bombing of a Jewish community center.
The demonstrators underscored the resistance her conservative successor will face to his plans for change.
Argentines warmed to Macri's pledges to liberalize the economy and stamp out corruption
"He wasn't a bad person; he obeyed orders and did not personally kill anyone," she said.
Scioli is backed by outgoing President Cristina Fernandez.
Argentina is one of the few countries that allow people to change their gender on official identification documents.
Antonio Stiuso disappeared following the murky death of state prosecutor Alberto Nisman in January.
The Calbuco volcano's unprecedented eruption has coated entire Chilean towns with ash clouds.