Brazil World Cup stadium damaged

Wind and rain blew debris from the roof onto the pitch shortly before a regional league match at the Mineirao World Cup stadium in Belo Horizonte.

Safety features are being added to a World Cup stadium in Brazil following the death of a worker. (AAP)

Wind and rain blew debris from the roof onto the pitch shortly before a regional league match at the Mineirao World Cup stadium in Belo Horizonte, Brazilian media said on Sunday.

Just over three months before the big kick-off, workers had to sweep the debris away at the 63,000-capacity stadium after pieces of metal designed to collect and drain rain water became detached during a storm and plunged to the ground, Folha de Sao Paulo reported.

Three metal pieces came loose and fell, just before a match on Saturday between hosts Gremio and Minas Boca. Nobody was hurt.

Brazil has been racing against the clock to get its 12 venues ready, half of which missed a December 31 FIFA completion deadline.

FIFA last month dropped a threat to axe Curitiba, still behind schedule, after work was stepped up in recent weeks.

There have been fatal accidents at three venues - three at Manaus and one each at Brasilia and Sao Paulo, venue for the June 12 opening game between Brazil and Croatia.