West Ham boss Allardyce retains hope of signing Blackburn's Olsson
Allardyce confirmed that he is chasing the Swede.
Allardyce admitted: "We have made an enquiry... negotiations are ongoing at the moment.
"In terms of what we're doing at the moment, we're as active as everybody else.
"If there's a player out there that we think can improve our squad, we'll try and move on him."