WASHINGTON, Aug. 2 (Xinhua) -- A school building in Minneapolis in the midwestern U.S. state of Minnesota collapsed after a natural gas explosion late Wednesday morning, leaving three people unaccounted for and others injured, authorities said.
Fire crew were searching for possible victims and trying to extinguish a blaze following the explosion-led collapse at Minnehaha Academy's upper school in Minneapolis.
The Minneapolis Fire Department initially said one person was killed, but later tweeted the fatality was not confirmed.
Assistant Fire Chief Bryan Tyner said fire crew rescued three people off the roof and were looking for three others who were unaccounted for.
In a statement, the academy said the explosion involved a natural gas leak, but it only affected the upper school. The school has a lower school, many blocks downriver.
