A Walmart employee was arrested Saturday night after Suffolk County police said he sexually abused a boy in the Islandia store's bathroom.

Police said Sunday a mother and her 5-year-old son were at the Walmart on Veterans Memorial Highway about 8:45 p.m. when employee Matthew Bulmer lured the boy into the store's bathroom, then proceeded to sexually abuse him.

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After an investigation by Fourth Squad and Special Victims Section detectives, Bulmer, 22, of Islip Terrace, was arrested at the store and charged with first-degree sex abuse and acting in a manner to injure a child.

At arraignment Sunday at Central Islip's First District Court, Bulmer was ordered held on $5,000 cash bail or $10,000 bond. His next court date is Friday.

Police said they are seeking others who may have been victimized by Bulmer. Contact the Special Victims Section at 631-852-6184.