It IS an interference engine, it means it CAN happen, Different situations will make a difference of weather or not it will happen. so yes there is a good chance of damage, but there have been many people who have lucked out without getting damage. Bore scope may help, not sure if you would be able to see all good enough to be sure though. I would think you would have to pull enough off to at least turn the cams so that you know when the valves are closed on a cylinder. even though the belt is broke, the position of the cam's would still keep some valves open.

I've never had to deal with this situation so cannot give you confident info, just going by what i've read on these sites. I'm sure someone who knows a lot more than me will chime in and help out more than I can. but just wanted to try and give you something to think about til then. good luck.