PORTSMOUTH — Police conducting a well-being check may have interrupted an attempted aggravated felonious sexual assault Monday.

Police responded to a State Street apartment to do a well-being check on a woman at the request of a friend who was concerned that the woman was in an unsafe situation, police said.

Upon arrival, police found the woman with Steve Morin, 45, a local man police say has no fixed address.

Police said their investigation determined that the woman was being held against her will, and that officers had allegedly interrupted Morin's attempt to commit an aggravated felonious sexual assault.

Morin was arrested at the scene and charged with four counts of attempted aggravated felonious sexual assault, false imprisonment and simple assault.

He is being held on $25,000 cash and $25,000 personal recognizance bail and is scheduled to be arraigned via video in Portsmouth District Court in the morning.

Police said the case is still actively under investigation.