Police are urging witnesses to contact them with information after a retired psychiatric nurse was held up by a robber who threatened to blow his head off unless he emptied his pockets.

Baah Heyford, 67, was walking through Queen's Park, Blackburn on Bank Holiday Monday at 5.30pm when the attacker pointed a gun at his head and made threats.

Anyone with information should contact Blackburn Police on 01254 51212.