 They used a flamethrower, among other weapons, to storm a British Army permanent checkpoint in Derryard, near Rosslea, on 13 December 1989.Another IRA unit attacked a British Army watchtower, the Borucki sangar, with an improvised flamethrower towed by a tractor in Crossmaglen, on 12 December 1992.The device consisted of a manure spreader which doused the facility with fuel, ignited few seconds later by a small explosion.