Calgary police are urging residents to be more cautious after criminals broke into eight homes through open windows or doors in two weeks.

From Aug. 5 to 19, police responded to break-ins at Arbour Lake, Rocky Ridge, Royal Oak, Harvest Hills, Coventry Hills and Hidden Valley. In all eight cases, culprits sneaked into the homes by removing screen windows and doors, creeping through unlocked windows and doors, or walking through garage doors.

In many cases, the homes were occupied at the time of the break-ins.

It’s unknown if any of the cases are connected, police said.

Officers are urging residents to “stay vigilant” and lock all doors and windows throughout the day, including when they’re home.

“Screen doors and windows do not provide any level of security as they can be easily cut or removed,” police said in a statement.

Anyone with information about the break-ins should call police or Crime Stoppers.