Barcelona striker Sergio Aguero will be sidelined for at least three months after undergoing heart tests.

Aguero was “subjected to a diagnostic and therapeutic process” that won’t allow him to play for a while, the club said on Monday. “The effectiveness of treatment will be evaluated in order to determine his recovery process.”

Barcelona did not give any more detail on the therapeutic process undergone by the 33-year-old Argentine. He had to be hospitalised for tests on his heart after feeling unwell on Saturday in the first half of the team’s 1-1 home draw against Alaves in the Spanish league.

Aguero, who just joined the Catalan club from Manchester City, had already missed several matches at the beginning of the season because of a previous injury. He has five appearances for the club so far, but started in only the previous two games.

Aguero’s only goal this season came in the 1-2 loss against Real Madrid at Camp Nou last month.