An Islip Terrace man accused of committing a lewd act while watching two underage girls from the window of his home is facing charges, according to police.

Authorities say a family member of the victims witnessed Joseph Zink, 59, performing the act naked in his home Friday on Sunrise Highway.

The family member called the police, and Zink was arrested following an investigation by detectives.

The charges against him include public lewdness and two counts of endangering the welfare of a child.

Authorities say Zink is set to be arraigned on Tuesday.