Khan won the vote but there has yet been any movement on confirming his next bout.
Despite the setback, Khan is the runaway victor of Pacquiao's recent Twitter poll asking his more than 100,000 followers who he should fight next.
Arum, who has been with Pacquiao nearly since his arrival at Freddie Roach's Wild Card gym in Los Angeles in 2001, admitted final details of the Horn fight, originally scheduled for the Suncorp Stadium in Brisbane, were "up in the air", and said his fighter was looking for bigger money in the United Arab Emirates.
The Roots Announce Lineup For 10th Annual "Roots Picnic" Festival
The 10th Annual Roots Picnic will take place at the Festival Pier at Penn's Landing on Saturday, June 3. Tickets are officially on sale now through Ticketmaster at the event's website.
Bob Arum, Pacquiao's Las Vegas promoter, had labelled reports that Khan-Pacquiao was close to being signed as "complete bull****".
This is the opinion of Irish boxing star Barry McGuigan, who recently wrote a Daily Mirror column advising Khan against fighting Pacquiao.
Pacquiao's team are still believed to be talking to other potential opponents after the Filipino put out a poll on Twitter to ask fans to pick his next opponent. Very few mentioned Horn.
Trump Makes up Terror Attack in Sweden to Defend 'Muslim Ban'
It also baffled the Sweden residents and others on Twitter as nothing unusual had happened in the country. Fox News on Friday had aired a report about alleged migrant-related crime problems in the country.
The Bolton-born fighter has been out of action since he was knocked out by Saul Alvarez last May. Whether (the offer) is real or not real - he is determined to explore it to see if it has any validity.
Koncz then apologized to the; "Australian government and the fans there for a last-minute change in plans". Pacquiao is coming off a unanimous decision win over Jessie Vargas where he won the WBO welterweight title.
The 'Vampire Diaries' Producer Just Revealed MAJOR Clues About the Finale
Whether it's to Stefan or somebody else, Caroline walking down the aisle in June would be a great ending for her character. Alas, despite saving her life a handful of times, they have brought a lot of death and destruction into her life.