A 3-month-old boy was hospitalized with a serious brain injury Monday night after being shaken violently by his father, Buffalo police said.

Alex Mercado, 21, of Amherst Street was charged with reckless assault and second-degree assault in the incident, which occurred shortly before 8 p.m. Monday, Police said they were summoned by Erie County Child Protective Services to Women and Children’s Hospital, where Mercado was arrested,

Police said the boy’s mother, Crystal Seliciano, reported the incident.