Provincial police are teaming up with local and national emergency services for two days of operational exercises in London and Middlesex County starting Wednesday.

The public is being made aware that if they see what looks like a tactical emergency situation, to not be alarmed.

"In the interests of participant safety, the media and public are strongly urged to adhere to directions being provided by perimeter signage and security personnel until the exercise has been completed," said OPP in a statement.

The OPP is asking people to not call 911 to inquire about what is happening at various locations. The police are expected to share updates about the exercises on social media.

"In general, this exercise brings together agencies and personnel to coordinate and manage response to an active scenario under emergency conditions in real time," said the release.

While few details have been releases about the exercises or their locations, over a dozen agencies are expected to take part, including: