Complex sentence: The police department rejected the allegation, and replied that this call referred to the earlier altercation, and affirmed that when, 40 minutes later, further calls arrived reporting violence at Zion Square, additional officers were sent.
Split into simpler sentences: The police department rejected the allegation, and replied that this call referred to the earlier altercation. They affirmed that when, 40 minutes later, further calls arrived reporting violence at Zion Square, additional officers were sent.