Nov. 11 (UPI) -- Royal Spanish Football Federation officials criticized Barcelona on Tuesday for a lack of information about Lamine Yamal's groin injury treatment.

Yamal started Barcelona's last six games, including a 4-2 win over Celta Vigo on Sunday in Vigo, Spain. He scored four goals and provided three assists over that span. Barcelona announced Tuesday that the 18-year-old striker underwent a "specific treatment required to ensure full recovery" from his recently sustained injury.

"The [federation's] medical services wish to express their surprise and concern after learning at 1:47 p.m. on Monday, Nov. 10, the day of the official start of the national team's training camp, that Yamal had undergone an invasive radio frequency procedure to treat his pubic discomfort that same morning," the federation said in a news release.

"This procedure was performed without prior notification to the national team's medical staff, who only learned of the details through a report received at 10:40 p.m. on Monday, which indicated a medical recommendation for rest for 7-10 days.

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