Police in Glasgow have released CCTV from two incidents in Glasgow following a day of trouble during Irish Republican marches.

A major deployment, including riot police, mounted officers and a force helicopter, was out in the city centre as two processions were met with protests on Saturday, September 7.

It's estimated that around 1000 people were involved in the marches and subsequent protests.

Glasgow Times: A major police response on September 7A major police response on September 7

READ MORE: No arrests made at four Loyalist marches in Glasgow despite major police concerns

There were several arrests on the day and one officer was left needing hospital treatment after being struck by a firework thrown into the crowd.

Now, detectives have released CCTV images of men they wish to speak to following two separate events in the city.

The first incident being probed by police occurred in the Barrowlands Park area at around 3.30pm.

Two men sustained injuries as a result of the attack.

Glasgow Times: One of the men police want to speak toOne of the men police want to speak to

READ MORE: Full list of 14 marches planned for Glasgow in coming weeks

Officers are now looking to speak to three men they believe can assist with enquiries.

The first is described as white, between 25 to 30-years-old, 5feet 6inches tall and of slim build with short brown hair.

He is shown in the image wearing a green t-shirt, blue jeans and black trainers, with a dark jumper tied around his waist.

The second is also white, aged between 25-35-years-old, 5feet 8inches tall and of slim build with short brown hair.

Glasgow Times: The second man police want to speak toThe second man police want to speak to

He is shown in the image wearing a grey t-shirt with a white stripe on the collar, black track suit bottoms, black trainers, a hooded top around his waist and a watch.

The third is also white and of similar age. He is around 5feet 10inches tall and of medium build with dark hair.

He is shown in the image wearing a yellow/green long-sleeved top, black skip cap, black shorts and purple trainers.

Glasgow Times: The third man officers want to speak toThe third man officers want to speak to

The second incident took place shortly after 4.55pm in the Broomielaw area near the River Clyde.

During this time, a number of items were thrown by those involved.

On this occasion, detectives have released images of two men they believe can help them with their investigation.

The first man is described as being between 30 to 40-years-old, average height, of slim build with short, thinning hair.

Glasgow Times: Officers want to speak with this manOfficers want to speak with this man

He is shown in the image wearing a red tracksuit top, grey bottoms and white trainers.

The second man is described as being aged in his forties, average height, medium build with facial hair.

He is shown in the image wearing a blue hooded top with a red stripe, blue jeans and white trainers.

Glasgow Times: Officers believe this man can help with inquiriesOfficers believe this man can help with inquiries

Detective Sergeant Ainsley Clark said: "I would appeal to anyone who recognises either of the men pictured or has information which may help us identify them to come forward as soon as possible.

"You can contact Police Scotland on 101, quoting Storm reference 1229 of September 7, or call Crimestoppers anonymously on 0800 555 111."