Boats come loose and overturn at Hepworth Wakefield weir

Boats moored by the weir at the Hepworth gallery have overturned after they became loose.
Boats at the HepworthBoats at the Hepworth
Boats at the Hepworth

Some of them drifted towards the centre of the water while others could be seen overturned.

One appeared to have drifted over the weir.

It is not yet clear what caused the boats to become loose.