Lanzini ruptured his cruciate knee ligament and is expected to be out for at least six months.
Fuego volcano erupts in Guatemala
Super-heated volcanic debris swept through small communities on the volcano's flanks Sunday with little warning for residents. It said the lahars could sweep down the mountain laden with concrete, rocks up to a meter (yard) in diameter and tree trunks.
Lanzini's original selection raised some eyebrows as he was picked by manager Jorge Sampaoli ahead of Inter Milan forward Mauro Icardi, who scored 29 goals in Serie A last season.
Lanzini's injury was confirmed on Argentina's men's verified Twitter handle, Seleccion Argentina.
The 25-year-old, who had been linked with a summer transfer to Liverpool, now faces a lengthy spell on the sidelines.
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According to TMZ , an autopsy will be carried out to determine the cause of death, but police aren't treating it as suspicious. O'Neill appeared in seven episodes of Sons during its sixth and seventh seasons, including the 2014 series finale.
Argentina cancelled their final warm-up clash with Israel on Saturday, meaning the only preparation they have had since a 6-1 drubbing at the hands of Spain in March was a routine 4-0 victory over Haiti.
The seriousness of the injury also means Lanzini is likely to miss the opening games of the 2018-19 Premier League season.
Key takeaways from California's primary election
The senate race in New Mexico brought arguably the least drama, as both party's candidate ran unopposed in the primaries. With Republican incumbents on the ballot Tuesday in only four of 42 districts that are all or mostly in L.A.