What are you using for the land mine? sunken barrel, empty explosion? I know that claymores will cause sys dump just as in LW. If you use the empty explosion first make a small area trigger (not much bigger than a sound marker and do not give it a number ) because the empty explosion cant be seen on the editor. The small area trigger is just so you can locate the empty explosion , but when you click on it ,it will show up in the lower left hand corner of the editor. Then make a new area trigger (the one for the event) make sure you group your empty explosion(s)
EXAMPLE:
IF:
Group 1 (blue player) is in area 1 (area trigger 1)
THEN:
Eliminate group 3 (empty explosion)