Northern Ireland conceded three quick goals as they made major tournament debut
Nelson pulled one back with their first ever goal before Reiten grabbed fourth
Shiels' side bottom of group, which also includes England and Austria
Their next game is against Austria on Tuesday
Norway 4-1 Northern Ireland
Gail Redmond
Ex-Northern Ireland international on BBC One
It was unselfish play from Norway, they are such a team and they are willing to get Ada Hegeberg off the mark at this Euros.
They have been very impressive in the final third.
Norway 4-1 Northern Ireland
Norway 4-1 Northern Ireland
You can sense Ada Hegerberg is absolutely desperate to score in this match.
She has come close a few times and has just tapped the ball into the net, but the goal is ruled out for offside.
Norway 4-1 Northern Ireland
Andy Gray
BBC Sport NI at St Mary's
Ada Hegerberg has played, and got the better of, a lot of world class defenders.
It's been no bother to Sarah McFadden. She's been immense.
Image source, Getty ImagesNorway 4-1 Northern Ireland
Northern Ireland defender Kelsie Burrows is replaced by Rebecca Holloway.
Norway 4-1 Northern Ireland
That strike by Reiten makes it 17 goals in 67 international appearances for the midfielder.
Image source, Getty ImagesReiten celebrates her goal
Norway 4-1 Northern Ireland
Ada Hegerberg goes down in the box under a challenge from Abbie Magee and is outraged at not getting a penalty.
Image source, Getty ImagesNorway 4-1 Northern Ireland
Gail Redmond
Ex-Northern Ireland international on BBC One
You can just see the gap was too big and Burns could not get across in time.
Magee has been fantastic all night but blind-sided her goalkeeper.
A tremendous goal.
Image source, Getty Images
Guro Reiten (54 mins)
Norway didn't take long to respond to Northern Ireland grabbing their goal.
Chelsea's Guro Reiten curled a lovely low free-kick past Burns and into the bottom corner.
A reminder of the Norwegians' class.
Image source, Getty ImagesNorway 3-1 Northern Ireland
Gail Redmond
Ex-Northern Ireland international on BBC One
Rachel Furness kept it alive but it fell to Nelson.
She is already a legend in Northern Ireland, even more so now.
Norway 3-1 Northern Ireland
Natasha Dowie
Reading and England striker on BBC Radio 5 Live
A perfect start for Northern Ireland. I had goosebumps. They deserved that. They were on the front foot. They need to do that more.
Image source, Getty ImagesNorway 3-1 Northern Ireland
Andy Gray
BBC Sport NI at St Mary's
It just had to be Julie Nelson. There from the very start when the team reformed in 2004.
Nobody deserves that more. Wow!
Image source, Getty ImagesJulie Nelson (49 mins)
What a moment as Julie Nelson gets Northern Ireland's first ever goal at a major finals.
It's actually hard to describe what a huge, huge goal that is for the country and the player.
She will never forget that.
The ball fell to her in the box and she guided her header goalwards, with the ball crossing the line before keeper Guro Pettersen got her hands to it
Image source, Getty ImagesNorway 3-0 Northern Ireland
Northern Ireland win a corner right in front of their fans.
Norway 3-0 Northern Ireland
Big news as the second half kicks off.
Northern Ireland captain Marissa Callaghan returns from injury as she replaces Nadene Caldwell as a half-time sub.
HT: Norway 3-0 Northern Ireland
Andy Gray
BBC Sport NI at St Mary's
Here comes Marissa Callaghan - captain fantastic is on!
Norway 3-0 Northern Ireland
With Ada Hegerberg back, Norway are a force in the finals again.
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Norway 3-0 Northern Ireland
Natasha Dowie
Reading and England striker on BBC Radio 5 Live
Northern Ireland had to stay in the game longer, frustrate the Norway team. The most disappointing thing is the goals they’ve conceded, Norway haven't had to work for them. There hasn’t really been any incredible play, it’s been individual errors. It should have been more. It’s just about pride now.
Image source, James Marsh/ShutterstockHT: Norway 3-0 Northern Ireland
Andy Gray
BBC Sport NI at St Mary's
This has been Northern Ireland's tenure under Kenny Shiels summed up in 45 minutes.
Plenty of promise and endeavour, the odd error and the warrior spirit that epitomises his team.
It's the same scoreline as it was at half-time in Shiels' first match in charge of Northern Ireland which, ironically, was against Norway way back in August 2019.
Image source, Getty ImagesHT: Norway 3-0 Northern Ireland
Caragh Hamilton
Northern Ireland international on BBC One
Northern Ireland would have been under no illusions about how difficult this game would have been.
Northern Ireland would have known about the threat that Norway offer and we know how fast they come out of the traps and just flood forward.
The early goals kill the momentum and we have seen their attacking prowess come through.