All of the dead from the accident in the Tanda Dam lake in the province of Khyber Pakhtunkhwa were between the ages of seven and 14, the news agency said in a post on Twitter, citing police official Mir Rauf.

"A rescue operation is underway," Rauf said.

The news agency gave no more details.

(Reporting by Mrinmay Dey in Bengaluru; Editing by Robert Birsel)