Play-off hopefuls Doncaster suffered a heavy defeat away to league leaders Luton.
Luton sit top of the table five points clear of second place Barnsley while Doncaster are one point off a sixth place Peterborough United with a game in hand.
John Marquis had a weak shot early on in the first half for Doncaster that was easily collected by James Shea, but from then on Luton took over and controlled the game.
The hosts took the lead on the 33rd minute with Pelly Ruddock’s hopeful shot from outside the box which bounced past Marko Marosi and into the net.
Danny Hylton had two close shots but the score remained 1-0 at the break.
Early in the second half, Hylton continued his assault on Doncaster’s goal, initially hitting the post before finally getting Luton’s second on the 57th minute when he tapped in a shot from Luke Berry.
Luton were unrelenting as Lee then hit the underside of the bar.
Then with eight minutes to go, LuaLua got a well deserved third goal after running onto Stacey’s pass after weakness from Doncaster.
Sub Harry Cornick nearly made it 4-0 but it was Berry who got the final goal in stoppage time from 20 yards, cementing the win for the league leaders.
The win against Doncaster means that Luton have now gone 26 league games unbeaten having last lost to Barnsley 3-2 back in October.
Luton Town manager Mick Harford said: “I thought it was an all round performance.
“They’re a great group and I have got to be honest with you, the fans shouldn’t be singing my name, they should be singing the players’ names.”
Grant McCann, Doncaster manager, said his teams performance was not good enough.
He said: “We were miles away from minute one. From the first minute we were second best. Luton are a top team but we were nowhere near it today.
“Luton are a good team, they play well here but we made it very easy for them.”
The defeat puts Doncaster under pressure in their final eight games if they hope to achieve promotion to the Championship.