Bradford claimed their third victory in four games with an impressive win over fellow play-off chasers Grimsby.
Lewis Richards and Richie Smallwood put Bradford two goals up, with Alex Pattison notching a third after Cameron McJannet pulled one back for the Mariners.
The home side had been frustrated by Grimsby goalkeeper Jordan Wright for much of the first half.
Wright thwarted Ciaran Kelly's close-range header then pulled off a superb double save from Antoni Sarcevic and Bobby Pointon.
He was at it again to push away Calum Kavanagh's long-range effort as Bradford, missing injured top scorer Andy Cook, threatened the breakthrough.
But it came right on half-time when wing-back Richards converted Aden Baldwin's cross to score in successive games.
Smallwood doubled Bradford's lead with a penalty after McJannet fouled Sarcevic.
But the Grimsby centre-half made amends when he pulled one back three minutes later with a looping header from Denver Hume's corner.
Bradford restored their two-goal lead on 69 minutes with Pattison's driving run and shot that flew in off the post.
It is the first time the Bantams have won four in a row at Valley Parade for four years.
Match report supplied by PA Media.
Bradford City 3-1 Grimsby Town: Graham Alexander's post-match reaction
