Cant get past lvl 1 Watchers keep

[Skeletoff]

I cannot start the ritual. After placing candle and bell on the altar, 4 statues came alive. However I killed only 2, then noticed that rest is gone. Became somehow...invisible, bugged invisible. I managed to kill the 3rd one by cloudkill - after it died the corpse appeared. Now I believe the 4th statue is *somewhere* since if I cast detect evil it says statue:spell inefective. Yet, I cant find it. True sight, detect ilusions, nothing helps. Also the door at 670,900+- cant be closed - might have something to do with missing statue. The corpse of statue killed by cloudkill, mentioned above, was very close to this door.
So, how to kill that which is bugged?

[Crenshinibon]

You don't actually *need* to kill all the statues to go into the portal. As soon as it is opened, you can simply go through, avoiding the fight altogether.

[Darth Malignus]

I cannot start the ritual. After placing candle and bell on the altar, 4 statues came alive. However I killed only 2, then noticed that rest is gone. Became somehow...invisible, bugged invisible. I managed to kill the 3rd one by cloudkill - after it died the corpse appeared. Now I believe the 4th statue is *somewhere* since if I cast detect evil it says statue:spell inefective. Yet, I cant find it. True sight, detect ilusions, nothing helps. Also the door at 670,900+- cant be closed - might have something to do with missing statue. The corpse of statue killed by cloudkill, mentioned above, was very close to this door.
So, how to kill that which is bugged?

I had the same problem. It´s the Ogre statue, if I´m not mistaken. A Horrid Wilting took care of that for me. You just have to target the corner of the wall the door is placed in. Right below the nr. 8 on the map.
Baldur's Gate II @ GameBanshee
Try shooting around that spot for some time, and you´ll probably get it eventually. It´s somewhere by that corner.

[Skeletoff]

thanks, works