What is the fine-grained topic of the following text: ​ Grande Prairie, AB, Monday, February 4, 2019, 8:50 a.m. – Students and staff at Harry Balfour School were briefly under Hold and Secure this morning during 8:07 a.m. - 8:16 a.m. while police responded to a situation in the area. Only return the topic.
Hold and Secure at Harry Balfour School due to a police situation in the area.