naz nazneen is here with us on set. this is an ooefr -- overwhelming situation for them. >> it is but the authorities have been preparing with the various attacks and gun fights that have happened against their own police stations against military targets, so they are extremely well trained, the tunisian national guard in particular. and there is the presidential guard, that's a unique crack unit. i'm sure they will be very much across this. there have been reports of military helicopters flying above. they'll want to get as much information as possible from inside that museum to see -- from people coming out, to actually work out whether it is indeed two attackers, and whether these attackers have anything strapped to them. they are going to have to tread very carefully on this. and tunisian authorities have been criticized in the past for going in rather heavy handedly at times, but they are going to have to treat this very carefully. >> okay. thank you very much indeed. you are watching al jazeera. it is coming up to