POLICE are seeking video footage in a bid to catch those responsible for a mass sectarian clash in Glasgow as part of a "robust" criminal investigation.

Riot police were called onto the streets of Govan on Friday evening after an Irish Unity march was met by loyalist protestors in scenes described by the First Minister as "utterly unacceptable".

Mounted officers, a helicopter and dog units were also used to quell the clashes in the Govan district.

The planned march by the James Connolly Republican Flute Band was intended to start at 6.30pm but it was met by a counter demonstration of "several hundred people" from loyalist groups at around 7pm.

Police said this led to "significant disorder", with Govan Road blocked by officers.

READ MORE: Republican group promise 'fightback' against loyalists after Govan riots

Barry Angus, 37, and Mark Cumming, 21, were arrested over alleged breach of the peace, appeared in court on Monday and were released on bail.

They are expected to appear again before Glasgow Sheriff Court on October 1.

HeraldScotland:

Now police are hunting for footage and images as part of an operation aimed at finding as many of the rioters as possible.

A confidential email address has been set up -OperationPindot@scotland.pnn.police.uk – to allow anyone to send mobile phone or dash-cam footage, photographs or other information, as it continues to investigate "significant public disorder" in the Govan area.

READ MORE:Two men arrested after trouble at Irish unity march causes riot scenes in Glasgow 

Detective Inspector Kevin Gilmour, the officer leading the enquiry, said: “Since the events of Friday evening officers have been carrying out house-to-house enquiries in the area and reviewing footage from public space CCTV.

“We are determined to identify as many people as possible who were involved and I am now appealing to the public who may have been in the area and captured the events to send it to us.

“The email address can be used to send moving footage from a mobile phone or dash-cam or photographs which may show someone involved.

“If you were in the area, please let us view the footage as it may be of more significance than you believe." Two more republican marches are due to take place in Glasgow on Saturday.

READ MORE: Riot police swoop as trouble flares at Irish unity march in Glasgow

Events from Cairde Na Heireann (Calton Republicans) and Friends of the Irish Republican Prisoners Welfare Association (IRPWA) are listed on the future processions website of Glasgow City Council.

Area Commander, Chief Inspector Shaheen Baber added: “I can re-assure our local communities that everything is being done by our officers to find out who was involved in the scenes we witnessed on the evening of Friday, August 30. By working together we can tackle such behaviour in our communities."