West Ham 3 Millwall 1 (aet)

There was palpable tension before the game - with outbreaks of violence causing the suspension of the eastbound District and Hammersmith and City lines and the closure of West Ham and Upton Park stations.

There was also a stabbing close to the ground as rival fans clashed, overshadowing what was a half-decent match inside the stadium.

An 87th minute strike from Junior Stanislas, cancelling out Neil Harris's 26th minute goal for the visitors, prompted a mass pitch invasion from the home fans that took several minutes to clear.

It was the moment West Ham fans had been waiting for and three more times they disgraced themselves by entering the playing area to taunt their Millwall counterparts. The actions will undoubtedly earn the Hammers a hefty fine from the FA.

The equaliser broke plucky Millwall hearts. With just 15 fit players to choose from manager Kenny Jackett could be proud of his team, who matched their Premier League opponents for much of the first 90 minutes.

West Ham, playing just two days after another tense derby against Tottenham, looked off the pace against the League One side, and after a cagey opening found themselves a goal down when Harris capitalised on a weak header by Danny Gabbidon to smash the ball home at Rob Green's near post from just six yards out.

The strike sent visiting fans into raptures and they looked as though they would be heading back to south London happy as they clung to their slender lead.

The introduction of Hines at half-time did pep up West Ham's forward line, although Millwall's patched up back-four - denied the services of Tony Craig just before kick off after the skipper suffered a back spasm - fought a stout rearguard action.

Jack Collison, playing despite losing his father in a motorbike crash on Sunday afternoon, almost put the Irons on level terms just after the break but his shot bounced back off the post.

West Ham began to up the pressure, with both Hines and Stanislas using their pace to good effect to stretch Millwall's defence.

Gianfranco Zola further beefed up his attack by introducing Frank Nouble just after the hour mark, replacing the disappointing Radoslav Kovac.

With the clock ticking down and Millwall still leading it began to look bleak for the Premier League side.

Chris Hackett almost doubled the advantage on 82 minutes when he hit a rasping drive that Green did well to tip over.

But just a minute later Stanislas swept home a Julien Faubert cross to prompt pandemonium in the stands, and it took several minutes to clear the pitch.

It meant six added minutes of time but neither side could force a decisive goal.

Millwall brought on Jason Price for the start of extra time but it was West Ham who looked the more positive as the visitors began to wilt.

They earned their reward when referee Paul Taylor awarded a penalty against Andy Frampton, who was sliding across to block the ball when Hines' cross hit his arm.

Stanislas was the coolest man in the stadium as he stepped up to send Forde the wrong way and slot the ball home.

Cue another pitch invasion and this time the Millwall players took sanctuary in the technical area, and it looked at one stage as if they would leave the field altogether.

To their credit they carried on and Jackett threw on Ashley Grimes and Adam Bolder to try to force an equaliser.

But the game was put out of reach when Hines scored an excellent goal in the 112th minute.

The young forward collected the ball inside the Millwall half, bamboozled Frampton with his direct running, before smashing the ball past Forde from the edge of the box.

Millwall could scarcely muster a response and it was left to Faubert to almost break his West Ham duck when presented with a great opportunity at the end of the first period of extra time, only for his shot to hit Forde and spin out for a corner.

West Ham looked to have settled for 3-1 and Millwall, almost spent, could not find a way through in the second extra period.

The final whistle brought more fans onto the pitch and, although emotions were running high, the scenes brought back memories of the dismal days of hooliganism of the 1970s and 1980s.

A visibly shocked Zola, who admitted he had never encountered scenes like it in his career until this evening, and he admitted it took the shine off the result.

He said: "What can I say? I am a sportsman and I love the game. I try to make the game enjoyable for everybody to watch. The other thing (trouble) hasn't got anything to do with football.

"I cannot control other situations. It is beyond my powers and I would if I could.

"I'm disappointed. I don't want to see things like that. I'm sure there will be enquiries and they will try to find a solution."

There were also reports that Carlton Cole was racially abused by Millwall fans during the game.

The England striker confirmed to The Wharf that he was the subject of monkey chants from the visiting support, but he shrugged it off.

He said: "I heard it. It's football, you know. I know I'm not a monkey. I might be as strong as a gorilla but I ain't a monkey.

"You've just got to get on with it. We got the result and that's the main thing."

So, West Ham progress to the third round but will undoubtedly pay a heavy price for a night that proved memorable in the wrong way for many inside the ground.

West Ham United: Green, Faubert, Spector, Gabbidon, Tomkins, Collison, Parker, Kovac (Nouble, 63), Payne (Hines, 45), Cole (Upson, 119), Stanislas. Unused subs: Kurucz, Collins, Daprela, Lee.

Booked: Gabbidon, Parker, Cole, Collison.

Goals: Stanislas 87, 97 (pen), Hines 102

Millwall: Forde, Dunne, Frampton, Smith, Barron, Martin (Price, 115), Fuseini, Laird, Hackett, Harris (Grimes, 100), Alexander (Bolder, 110). Unused sub: Sullivan.

Booked: Frampton, Laird.

Goal: Harris 26

Attendance: 24,492

Referee: Paul Taylor