Shots rang out inside the Marlboro Houses overnight, sending one person to the hospital. 

According to police, it happened on the 16th floor of one of the buildings near Avenue V and West 11th Street at around 1:30 a.m. 

They say a man in his 20s was found with a gunshot wound to the chest. He's in serious condition at Lutheran Medical Center. 

It remains unclear what led to the shooting. No arrests have been made.