A jeep carrying 23 people from Kail to Taobat plunged into the river when the driver lost control of the vehicle, said police.
As a result, all the passengers inside drowned in the river. The bodies were retrieved later by local rescuers, the official added.
Eyewitnesses said that the car was swept away by the river’s strong current, making it difficult for rescue teams to locate it.
Rescue efforts are underway to recover more bodies from the river.
In a separate incident last week, at least 7 people were killed and six others injured when a van plunged into a deep ravine near Swat’s Malam Jabba.
7 killed as van plunges into gorge in Malam Jabba
According to police, the van carrying 12 staff members of a local hotel fell into a gorge while taking a sharp turn, killing seven people on the spot and critically injuring six others.