United executive vice-chairman Ed Woodward has left the team's tour in Sydney to conduct urgent transfer business, with the Fabregas move widely reported as his main target.
Moyes said he was hoping for news in the coming days on the offer, believed to be around £26 million.
"I couldn't tell you exactly where we are with [the Fabregas move]," he said, "but I will hopefully know a little bit more in the next day.
"I might have a little bit more information about how it's going.
"As far as players are concerned, we're looking to bring some in and we're working hard to do that.
"We're trying very hard to make some additions to the squad and hopefully we'll have some good news in the not too distant future."
Barcelona coach Tito Vilanova recently said it is Fabregas's intention to stay at Camp Nou and now vice president Josep Maria Bartomeu has stated Barca have no appetite for a deal.
"Barca can ensure they will not entertain any offers for Cesc," he said. "He is completely non-transferable."
Where Rooney's future was concerned, Moyes took one question about the striker's future in his press conference, and used it to once again affirm that he was not for sale.
Chelsea have made an initial offer for Rooney, rejected by Manchester United instantly.
"The club's position on Wayne Rooney is there's no change to that," insisted Moyes.
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