buildings and damaged vehicles imagist the crews are a fight but police say the cause of the blast has yet to be determined. let's get some more background on all this from d.w. mathias finding out who is in the chinese capital of beijing mathias it's good to see you so no official confirmation yet on the cause of this blast but do we have any indication what could have caused it you know we have almost no edge indication if this blast happened this morning as you can see it's already quite late today during the day we had quite confusing news the first news was that it happened at a factory later police had it happened at a vacant lot now what could cause an explosion at a vacant lot i don't know we don't know what what site this is we know that these explosion has been quite powerful some damage has been done in the radius of one kilometer around some buildings have collapsed that's stood nearby east building