If an रोगी वाहन, एम्बुलेंस is on its way to save someone, and it runs someone over, does it stop to help them?

The रोगी वाहन, एम्बुलेंस is already on an assignment. Someone would have to call a सेकंड रोगी वाहन, एम्बुलेंस for the separate accident.