ZURICH (AP) — Swiss police have increased security at the Zurich hotel where Real Madrid players are staying after an apparent fireworks attack on the building overnight.

Police say Tuesday that nobody was harmed in the attack on the Park Hyatt hotel, but a window burst and a lounge chair was damaged.

Hotel spokeswoman Judith Hoedl said guests were not at risk at any time and police were alerted early Tuesday. Hoedl says witnesses told police after hearing a bang, they saw two young men in hooded pullovers running away.

Madrid is scheduled to play FC Zurich in a Champions League game later Tuesday.