Officers responded to a home in the 300 block of York Avenue around 9 p.m. after receiving a report of "suspicious activity" involving a large group of people, Lansdale police said.
Investigators believe there was a fight between a resident and a group of people, but details are unknown.
Officers later discovered that during the incident, a single bullet was fired from a handgun inside a home, police said.
No one was injured.
Anyone with information about the incident is urged to contact Lansdale Police Detective Joseph Gary at (267) 642-9422 or at crimetips@lansdalepd.org.
Click here to follow Daily Voice Bristol and receive free news updates.