Initially the cause of the explosion Catastrophe was unclear , but was found Know to have been a bomb Use_firearm containing nails and ball bearings .

the headlining acts were faith no more , lou reed , nine inch nails , tool , violent femmes , ice-t , l7 , ween , primus , unk , pop will eat Expend_resource itself , the flaming lips , the tea party , the prodigy , therapy ? , live and pennywise .

The cars and their devices were recovered Recovering intact for forensic examination and both were found Know to contain petrol cans , gas canisters and a quantity of nails , with a mobile phone-based trigger Causation .