There was traffic chaos on the River Thames when two boats ended up wedged in Abingdon Lock.
It was closed for three hours, leading to queues of narrowboats and cruisers on either side of the lock.
The problem began when a narrowboat and a cruiser tried to get out of the lock together instead of one at a time and became wedged between the lock walls.
Environment Agency workers had to use a winch to pull the vessels apart.
No-one was hurt and there was only minor damage to both craft.
The incident began at 1.30pm on Saturday and it was not until 4.30pm that the lock was reopened.
By then, more than 30 river craft had built up on either side and the jam was not cleared until 6pm.
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