Noah and Gaby had an operation on hunting down Aleck Aragon. They didn't know that Anton is also there in the area they are about to raid, so does Clara and Silva who had a meeting regarding Clara's knowledge of who really is the last guard and her bargain in exchange for Anton.
Silva used Clara as shield against the bullets from Noah's group. Clara died on the spot, with Silva nowhere to be found as he escaped quickly. Anton watches from a distance as Noah's group carries out the dead body of his mother.