- Korey Smith nets in the 93rd minute winner for Bristol City.
- Joe Bryan smashed the hosts into a second half lead.
- Zlatan Ibrahimovic equalised six minutes later with free-kick.
- The Robins knock-out fourth Premier League side to reach the semi-finals.
- Recap: Chelsea 2-1 Bournemouth
Korey Smith sends Bristol City through to the semi-final.
The pitch has been engulfed by supporters, ruining the evening for the players who now have to celebrate in the tunnel rather than on the turf.
That brings an end to our live coverage of this game. But head over to our live blog of the semi-final draw, which is set to start imminently.
Full-time: Bristol City 2-1 Manchester United
Jose Mourinho beaten in the League Cup time for the first time in 90 minutes. Bristol City reach the last four of the Carabao Cup and knock-out a fourth Premier League side in this competition. Korey Smith got the goal and take nothing away from the Robins, they took the game to Manchester United and are deserved winners.
GOAL! Bristol City 2-1 Manchester United
Ashton Gate has taken off. The Championship side are ahead in the final minute as Korey Smith brings the ball down and slides it past Sergio Romero. Is there time for a comeback?
Three added minutes.
Paul Pogba in the book for descent towards the referee Mike Dean, after a foul on Romelu Lukaku as United looked to break. Into the final minute at Ashton Gate.
Pick a winner from here. United look the more likely at the moment, but Bristol City's legs are still there and they have given the holders plenty of problems when they have thrown players forward.
Luke Steele keeps Lukaku at bay for a third time. The chance looks to have gone but the Belgian sorts out his footing and his low shot is turned away at the past by the stopper.
Will we get a winner here? Both teams pushing hard to ensure there is not another 30 minutes. Romero has turn Pack's cross over the bar. The home side are not done.
Jamie Paterson with the hosts' best chance since being pegged back. He beats Darmian with ease but can't find the target from 15 yards. Really should have tested Romero.
Luke Steele winning the head-to-head battle with Romelu Lukaku and he pulls off a fine sprawling save to keep out the Belgian's header. United really pushing hard here as we enter the final 15 minutes.
Niclas Eliasson on for Josh Brownhill, who appeared to be limping. More fresh legs for Bristol City and you feel they may need it.
Yellow card for Marcus Rashford a late challenge on Joe Bryan, who had earlier disposed him when he went clean through on goal.
Luke Steele denies his former club, diving down to his left to keep out Lukaku's shot from the edge of the box.
Zlatan Ibrahimovic celebrates drawing Manchester United level.
Joe Bryan hammers Bristol City into the lead.
Mkhitaryan on for Ibrahimovic who lasts 69 minutes on his first start for eight months. Bristol City make a change too with Hordur Magnusson replaced by Matty Taylor.
This stat in some doubt tonight. Quarter of the game to go.
Bristol Citiy so close to re-taking the lead. Aden Flint beats Sergio Romero to a long throw and with the Argentine out of his goal and the net waiting to bulge, his header drifts wide.
United have not improved much since the equaliser and they call on Henrikh Mkhitaryan to see them through. He has not played in eight of the last nine games.
No doubt Mourinho's change reflects not only how well Bristol City have played bit also that he wants this tie done tonight. He doesn't want extra time, with Leicester to come on Saturday.
Romelu Lukaku still coming on for United, replacing Daley Blind. United going for it in the last 30 minutes.
GOAL! Bristol City 1-1 Manchester United (Zlatan Ibrahimovic)
The Robins were ahead for around six minutes. Paul Pogba wins a free-kick on the edge of the box and Ibrahimovic pulls rank, and as well he might as he thumps the ball into the far corner through a thread-bare Bristol City wall. Luke Steele has no chance.
Joe Bryan almost makes it two as Reid dummies the ball on the edge of the United box and it falls to the full-back but with his weaker right foot he can't test Romero and he makes an easy save.