Calgary police are reminding Calgarians to lock their vehicles and homes after several nighttime car prowlings and break  ins.

Police say, in many of the cases, thieves took garage door openers from both locked and unlocked vehicles parked on the street in order to get into the garage and take items.

In some cases, the offenders entered unlocked doors to the house through the garage to steal household items while residents were asleep.

In other cases, the offenders were able to get into the homes through unlocked doors and windows.

Residents across the city should be wary, but police have noticed a trend in recent months in the northwest in areas like Tuscany, Evanston, Panorama Hills and Sage Hills.

There have also been cases in the southeast communities of Chaparral and Copperfield, and the southwest neighbourhood of Bridlewood.

Police warn against leaving items in plain view in vehicles and remove the garage door remote from the vehicle when not in use.