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Ten people are believed to have been injured in a suspected gas explosion which caused the partial collapse of two buildings in Vienna.
The explosion has caused the collapse of several floors across the two buildings, police say.
Four people are seriously injured and six others have received minor injuries, according to reports.
Footage of the incident appears to show a group helping an injured person across the dusty street.
"(It's) as if a bomb flew in and tore a huge hole in the facade," a spokesman for the fire brigade said.
Police, rescue services and the fire brigade are currently at the scene.
'Vibrations' were felt several hundred meters away from the incident, Orf.at reports.
The explosion happened at about 4.30pm.