The Federal Investigation Agency is investigating 32 people.
Alongside Imran Khan, PML-N President Shehbaz Sharif is vying for the top post.
Police said the mother was being treated in hospital after taking poison.
He will travel to Islamabad for the ceremony on Saturday.
His family met the Chief Minister and handed over the cheque.
The new figure consists of 50 million dollars from the Pentagon and $42 million from interagency partners.
The Chief Minister warned of a grimmer situation as more rain has been forecast till Saturday.
Vajpayee was admitted to hospital on June 11 with a kidney tract infection and chest congestion.
The activities are for residents who prefer adventure, nature and historical sightings.
In an exclusive interview, the tourist who racked up over Dh170,000 in speeding fines in a rented Lamborghini tells his side of story.