Keep windows and doors locked, warn London police

London police headquarters is seen on Tuesday, June 16, 2015. (Jim Knight/CTV News London)

London police are issuing another warning after four more break-ins with a similar pattern in the city.

Officers want to remind the public to keep windows and doors locked at all times when you are not in the residence itself.

On Tuesday, police said they investigated seven break and enters to private residences following a similar pattern since June 20. With the additional four, that makes a total of 11.

Police say common elements of the break-ins include window screens being cut and removed with the suspect targeting jewelry and cash once inside the residence.

The crimes have all occurred during daytime hours, between 6:30 a.m. and 6:30 p.m.

Police are searching for a suspect who is described as being a female, white, approximately 20-30 years old with blonde hair in a ponytail, wearing a t-shirt and pants and carrying a backpack.

The Crime Analysis Unit of the London Police Service detected this pattern using analytical software purchased using a grant from the Ministry of Community Safety and Correctional Services.

Anyone with information in relation to this incident is asked to call the London Police Service at [phone] or Crime Stoppers at 1-800-222-TIPS (8477). Information can also be sent in on-line anonymously to www.londoncrimestoppers.com.