Mission question, destroying ammo crates

[grandkodiak 10]

I played the first senerio but I cant seem to finish one of the objectives. You find a box of enemy insurgent ammo crates and you are to destroy it. How do you do this? I shot at it, i threw granades at it, i shot 203 granades at it, ive walked upto to it looking for options to apprear... but it seems its indestructable and can only be used to take ammo or weapons that are in it. what am i missing?

[odjob 0]

Use satchel charges, if you dont have any look for them in the crates ;)

[Devil Dogs SF 13]

Tried satchel charges?

[the_duality 10]

Took me a while to realise there were explosives in it that I could use :P

[pipscouse 10]

RPGs from the crates work as well.

[jacobj9 10]

any explosive really