Scotland's First Minister Nicola Sturgeon, who wants to wrest immigration powers from the UK government, welcomed the police force's actions and blamed the British government for what she called a "dangerous situation".

Video footage showed two men emerging from the back of a van belonging to the interior ministry, which sets immigration rules for the whole of the UK.

After a stand-off lasting several hours, a crowd of onlookers clapped and cheered as one of the men waved and police officers made space for them to walk free.

British immigration officers had originally asked local police for assistance after a crowd gathered to block them.

Police Scotland said in a statement that it had "taken the operational decision to release the men detained by UK Immigration Enforcement back into their community".

The police force said it reached this decision "to protect the safety, public health and well-being of all people involved in the detention and subsequent protest".

Large gatherings are currently banned in Scotland as part of coronavirus measures.

Sturgeon, whose Scottish Parliament electoral district includes the area where the incident took place, said she had complained to the UK government and asked it to avoid such situations in future.

"No assurances were given - and frankly no empathy shown - when I managed to speak to a junior minister earlier," she said in a statement.

Sturgeon's Scottish National Party won the largest number of seats in an election for the Scottish Parliament last week, which she has said vindicates her call for a re-run of the 2014 referendum in which Scots voted against independence.

The SNP has also campaigned for Scotland's government to receive powers to grant immigration visas.

Australian Associated Press