Leaking fuel is likely to blame , authorities say . A man working at the site in Rosario before the fire ignited is taken into custody . Leaking gas was likely to blame for an explosion that killed at least 12 people , injured 60 more and brought down part of a building in Argentina on Tuesday , state media reported Wednesday . A swath of white smoke spreads over the city , located about 200 km from Buenos Aires . Rescuers are searching for over a dozen missing people , local newspaper Clarin reports .
Leaking fuel is likely to blame , authorities say . A man working at the site in Rosario before the fire ignited is taken into custody . A swath of white smoke spreads over the city , located about 200 km from Buenos Aires . Rescuers are searching for over a dozen missing people , local newspaper Clarin reports .