Complex sentence: The Federal Police managed to kill and injure the gunmen who are presumed to be part of La Familia Michoacana cartel, immediately after the gunfight army air and land units were sent to secure the area.
Split into simpler sentences: The Federal Police managed to kill and injure the gunmen who are presumed to be part of La Familia Michoacana cartel. Immediately after the gunfight, army air and land units were sent to secure the area.