Complex sentence: Security forces at the Governor-General's Office, tried to disperse the crowd some armed with Samurai swords fired on the protesters calling for the arrest and trial of the agents involved in the previous day's shooting, resulting in several deaths.
Split into simpler sentences: Security forces at the Governor-General's Office, armed with Samurai swords, tried to disperse the crowd. Some fired on the protesters who were calling for the arrest and trial of the agents involved in the previous day's shooting, resulting in several deaths.