20 injured as bus flips over after hitting tractor trolley

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Three crushed to death by speeding bus in Karachi's SITE area

At least 20 people were wounded two of them seriously when a passenger bus collided with a tractor trolley on Wednesday morning and flipped over.

Two of the people injured in the accident are in critical condition, rescue sources said, Private news channel reported.

The passenger bus was travelling from Muzaffargarh to Sialkot, transporting wedding-goers.