Ok, this is what I did.

As soon as the baddies begin attacking, travel to the area where they are coming from. It will be on the opposite side from the intel. The enemies should be coming out of a door and go in there and wait. The enemies won't be able to spawn out of that door and will be forced to spawn out the door with the intel. Also make sure you don't check for the intel until your heli comes to pick you up.