Spanish police clashed with Peru players at the squad's hotel in Madrid on Monday after fans gathered outside to greet the team - with one player reportedly arrested for allegedly hitting an officer in the eye.
The South Americans are due to take on Morocco at Atletico Madrid 's Civitas Metropolitano stadium on Tuesday, and were staying in the Spanish capital ahead of the game. However, it has been alleged by Peru's football association that "beatings and shovings" took place.
Players and fans were gathered outside the team hotel when incidents took place, with images and videos circulating on social media. Goalkeeper Pedro Gallese also spoke to Peruvian TV after the incident, which is understood to have happened the day before the friendly match.