Botswana police divers have recovered five bodies from the Zambezi river border after a ferry capsized.
The accident occurred on Wednesday at Kazangulu, as the ferry was crossing from Zambia to Botswana.
A truck carrying a heavy load of copper on board caused the vessel to tilt over, tipping a number of people and the lorry into the water.
Six people managed to swim ashore, but at least 15 are feared drowned.
Scuba divers from Namibia and Zimbabwe and a rescue team from Botswana's and Zimbabwe's defence forces are still searching for them.
Police suspect that some of the bodies might be under the truck.
Police say most of those on the ferry were cross-border traders - many of them women with small children.
Most traders use the ferry on this very busy route linking Botswana, Zambia and Zimbabwe.
Just a month ago plans were approved to build a bridge at Kazangulu following years of protracted talks between Botswana and Zimbabwe.