According to local reports, Flores sent the man off during a match in the Cordoba province, before the player retrieved a gun from his bag and shot the 48 year-old three times.
Police have confirmed that the assailant also shot another footballer, 25-year-old Walter Zarate, who is recovering after he was rushed to hospital.
“It all happened during the football match. We don’t know [exactly what took place], but it appears the player was angry, fetched a gun and killed him,” a police source told Efe news.
Flores' killing has attracted widespread condemnation on social media.
