Americans celebrating Thanksgiving in Britain may have felt right at home as Black Friday shopping chaos caused some disruption.

The practice of offering bargain basement prices the day after Thanksgiving has spread across the Atlantic, with some retailers opening overnight to lure determined shoppers.

Police were called early Friday morning to help maintain security at some supermarkets and outlets that offered deep discounts starting at midnight.

Fights broke out at some stores and major websites stopped functioning because of too much traffic as shoppers sought online bargains.

Greater Manchester Police said two arrests were made and injuries reported as police closed some stores to prevent more severe problems.

The force tweeted "Keep calm, people!" at one point.

There were problems in many parts of Britain, including Wales and Scotland.