There are numerous gun fights throughout the movie.
A man threaten another person with a gun. The person then succeed to take the gun. The man gets elbowed in the face. Blood is seen profusely pouring from his nose.
A place gets stormed by troops. A lot of shooting, but no visible blood. The scene starts quickly and is quite intense.
There's a fight on a train. Many people are involved. Some people are shot and killed. At some point you can hear an arm break. Nothing is shown, but you can hear the sound.
People are forced to get analysed. A man gets shot. No blood.
At two points there are people who gets executed. No blood.
A children's bedroom is stormed and they are shot with sleeping bullets. No blood but there is lots of screaming and it is a very tense scene, as they appear to be dead.