Delete row that has foreign key

I have 3 tables
Event
Users
Attending

The attending table has foreign keys to users and events and connects user id to event (when attending)

However some of these events need deleting and I can't do that until I manually delete entries from the attending table.

What I want is to delete entry in the events table, which would then in turn delete every entry in the attending table that matche event.id
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