"Messi, we're waiting for you. Javkin is a narco, he won't take care of you," said the handwritten message left on the ground by the men who shot 14 bullets into the supermarket's metallic facade in the early hours of Thursday.
Pablo Javkin is the mayor of Messi's hometown, Rosario, where the supermarket is located, some 320 kilometres northwest of Buenos Aires.
Javkin confirmed the supermarket belonged to the family of Antonela Roccuzzo, who shares three children with the football superstar, and said the aim of the attack was to "to create chaos in the city."
"Here, what's sought is the repercussion, it's perfidious," he said. "What story goes more quickly viral in the world than an attack on Messi?"
A witness confirmed seeing the two men arrive on a motorbike just before 3:00. One of them got off, fired the shots, dropped the note and they both fled.
"This has been going on for some time," said Javkin. "We have five security forces operating in Rosario yet they can do this because no one is chasing them."
Provincial police assistant chief Ivan Gonzalez told Cadena 3 television station that the message was "not a threat" but rather an attempt to "attract attention."
He said no one was hurt since there was no one on the premises at that hour.
The prosecutor in charge of the case, Federico Rebola, told reporters that there had been no previously known threats made against the Roccuzzo family.
"We're concerned, this has a huge repercussion, we have the video images and we're looking for more cameras," he said.
Rosario is a port city on the Parana river that has gradually become a nerve centre for drug trafficking and the most violent city in Argentina, with 287 murders in 2022.
The centrist mayor, left-wing governor of Santa Fe state, Omar Perotti, and the centre-left national government regularly pass on responsibility for counter-narcotics measures and the use of the city's security forces to each other.
At a meeting this week between the municipal, provincial and national security forces, provincial minister Claudio Brilloni said he had "urged the federal forces to greater collaboration, engagement and participation" in the fight against violence and criminality in Rosario.
Among the right-wing opposition, two declared candidates for October's presidential election called for help from the military police to fight drug trafficking in Rosario.
"The situation is complicated in Rosario... the drug traffickers have won," said Security Minister Anibal Fernandez.
