At least 20 people were injured today when a bag of crackers kept in the luggage  bracket of a private bus exploded in Unnao district, about 60km from here, police said.

The incident occurred this evening in Purwa area of the district when the bag fell off the bracket and exploded, leaving at least 20 passengers injured, police sources said. 

The injured were rushed to the hospital and a hunt was launched to trace the owner of  the bag, they said. 

About 50 passengers were in the bus when the accident occurred on way to Morena. 

Senior officials have rushed to the spot and the matter is being investigated, they said.