Some protesters were also injured as police fired plastic bullets to prevent them from storming the barrier.

Portadown Orange Order had earlier appealed for a peaceful protest after Northern Ireland's Parades Commission banned the route for the fifth consecutive year.

Here are some images from Sunday's events.

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Security for this year's parade started low-key

Portadown Orange Order wanted a peaceful protest

They object to their traditional route being blocked

At first the protest was dignified

But trouble flared at Drumcree bridge

A small crowd of protesters hurled missiles at riot police

Police were armed with baton rounds

A protester hit with a plastic bullet shouts at police

Several casualties had to be taken to hospital