Hull's hopes of avoiding relegation suffered a major setback as they were thrashed at home against Ipswich.
Hull took the lead when Dean Windass smashed home after Stuart Elliott's header hit the bar, but Francis Jeffers levelled with a close-range finish.
Ipswich went ahead when Jaime Peters curled a shot that deflected in-off Sam Ricketts and Alan Lee fired in for 3-1.
Jason de Vos poked in and Danny Haynes rifled home a fifth before Windass got a penalty after John Welsh was fouled.
Hull boss Phil Brown:
"It isn't over by a long way. We've slipped into the bottom three but maybe that has given us a kick up the backside for Saturday against Preston.
"We are limited to who you can select and hopefully we can get that right.
"It is up to us to maintain that belief, stay together and force the belief into the supporters that we can stay up," he said defiantly.
Ipswich boss Jim Magilton:
"Franny was outstanding and a real threat. He will always score goals at this level.
"I was absolutely delighted with his performance. He was the outstanding individual for us and has real quality.
"He gets one chance in this game and takes it - and that's the difference. We felt he could give us something."
Hull: Myhill, Ricketts, Coles (Turner 66), Delaney, Dawson, Parlour (Welsh 62), Ashbee, Marney, Forster, Elliott (Duffy 66), Windass.
Subs Not Used: Duke, Parkin.
Goals: Windass 22, 83 pen.
Ipswich: Price, Wright, De Vos, Bruce, Harding, Peters (Haynes 72), Garvan, Legwinski, Roberts, Jeffers (Walters 63), Lee (Richards 79).
Subs Not Used: Supple, O'Callaghan.
Goals: Jeffers 24, Peters 41, Lee 49, De Vos 62, Haynes 81.
Ref: G Salisbury (Lancashire).