Boston Mayor Marty Walsh distanced himself Monday from the possibility of General Electric, which is moving its world headquarters to Boston, occupying a portion of its new campus rent free for up to two decades.

That scenario was posited in a Boston Globe report, published four days ago, which said GE plans to construct one new building and rehabilitate two others in a parcel in South Boston's Fort Point neighborhood. The Globe story suggested that the two existing buildings would be owned by the Boston Redevelopment Authority and leased to GE, which would rehabilitate them, but not pay any rent.

Speaking after a City Hall event Monday morning, Walsh implied that the Globe report was the first time he'd heard of a deal structured in that manner.

"I'm not exactly sure what that deal's going to look like today," Walsh said. "Until [GE] found a location, we couldn't really have a conversation about what the incentive looks like."

"I have to do some more research on that"—i.e., the possibility of a rent-free deal—"to see exactly where the information's coming [from]," Walsh added. "Sometimes, this information's coming in here and I'm finding out reading in the paper myself. So I haven't had a chance to look into that one yet."

A spokesperson for the Boston Redevelopment Authority told WGBH News: "We're working closely with GE to facilitate the development of those buildings, but the final terms of the deal have not been reached.... We'll share more details as soon as they're available."

GE has already received a package of city and state incentives worth an estimated $145 million.

In 2015, the company ranked eighth on the annual Fortune 500 list, and its sales and revenues totaled more than $122 billion.

Last week, speaking to an audience of Boston business leaders, GE Chairman and CEO Jeff Immelt promised—twice—that any public money spent on GE's move to Boston would be returned "a thousandfold."