Ten children died on Sunday when their boat sank on a lake in northwestern Pakistan, a local police officer said.
All of the victims found in Tanda Dam Lake, located in Khyber Pakhtunkhwa province, were between 7 and 14 years old, according to policeman Mir Rauf.
He said a rescue operation was underway.
The officer added that eleven children had been rescued, six of them in serious condition.
The boat was carrying between 25 and 30 students from a Koranic school on a school trip.
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Drownings with multiple fatalities are common in Pakistan, where damaged and overloaded ships can lose their balance, causing passengers to fall.
Many Pakistanis do not know how to swim, especially women, discouraged by the conservative mores of their country.
Their full outfits also become a weight when soaked.
In July, eighteen women drowned when a boat sank on the Indus River in Punjab province.
Its passengers were celebrating a wedding.