A PIECE of graffiti commemorating a Welsh valley drowned to make a reservoir has been defaced with swastikas.

The “Cofiwch Dryweryn” painting on a wall on the A5 between Llangollen and Corwen was defaced overnight.

Pol Wong, one of the founders of the Cofiwch Dryweryn Facebook page, said he was “very sad” to see the Nazi symbols appearing in the Dee Valley.

Mr Wong’s daughter spotted the graffiti on Tuesday morning and took a picture of the vandalism.

He said: “I feel very sad to see that symbol in Wales. Even worse is the fact that they are defacing a memorial which commemorates the destruction of a Welsh community.

“Whoever did this obviously condones the drowning of Capel Celyn and several other Welsh communities.”

The “Cofiwch Dryweryn” message was first painted in Llanrhystud in mid-Wales by Meic Stephens – father of Radio One DJ Huw Stephens – in 1963.

Mr Stephens painted the slogan to commemorate the drowning of the village of Capel Celyn near Bala.

The valley was flooded to create a reservoir to serve the city of Liverpool in the early 1960s, with families forced out of their homes against their will.