The Mohegan Sun casino leadership group, which owns the Sun, had wanted to sell to Celtics co-owner Steve Pagliuca in August for $325 million, and turned down a previous offer from Houston to buy the team for $250 million.

After the WNBA quickly squashed Pagliuca’s purchase and relocation bid, the tribe essentially took the Sun off the market. In part it was a reflection of its belief that it had no urgent need to sell. That decision also could be seen as a negotiating tactic.

Apparently, Houston has begun to bridge the $75 million gap to a significant degree.

A statement from the Mohegan Sun casino leadership group indicated that multiple “investment opportunities” for the team are under consideration and “no agreement” has been reached:

“Mohegan leadership continues to actively explore different avenues of investment opportunities for the CT Sun. We are excited with the growth of the WNBA and women’s basketball, and are taking a rigorous, diligent approach to this work. We fully understand and appreciate the value of the phenomenal women’s basketball we have had the privilege to support and lead for 22 remarkable seasons. No agreement has been reached at this time, and we are not at liberty to discuss the details of any potential concepts under consideration.”

While ownership can change hands in a market, a new owner cannot move a team without league approval. The league did not approve of Pagliuca’s bid for a variety of reasons, including having Boston on a list of possible expansion sites for no earlier than 2033.

The WNBA, which is co-owned by the NBA, also prefers having common ownership between NBA and WNBA teams in shared markets.

The Celtics had expressed little to no interest about being an expansion destination before the Pagliuca bid. New Celtics owner Bill Chisholm, speaking at his introductory news conference in September, said he felt “Boston should have a team” and that “we’ll do what we can to expedite things, but there is a process there.”

Houston has long been a target of the WNBA and its commissioner, Cathy Engelbert. The Houston Comets won the league’s first four titles, but folded in 2008 after the previous Rockets ownership group sold the team.

The Rockets are owned by casino magnate Tilman Fertitta, who also is the US ambassador to Italy under President Trump. Fertitta put in a bid for an expansion team, but his offer was reportedly below the $250 million fee that Philadelphia, Cleveland, and Detroit put up to get teams.

At the news conference announcing the three new franchises — all set to begin play before 2030 — Engelbert said Houston was “up next” for getting a WNBA team.

“One of those I wanted to shout out, because they have such a strong history in this league and their great ownership group, is Houston,” Engelbert said. “We’ll stay tuned on that.”

The league reportedly offered to purchase the Sun outright, which would allow it to move the team to its choice of city, but the Sun threatened to pull the team off the market.

The WNBA is in the midst of a heated labor battle, with a deadline of Jan. 9 looming for the players’ association and the league to reach a deal or risk a lockout. The players voted Thursday to authorize a strike “when necessary.”

The ESPN source said that while Houston ownership had improved its offer and a formal offer had been discussed, no exclusivity agreement has been signed and no final decision has been made on where the Sun go — or if they stay.

Katie McInerney of the Globe staff contributed to this report.

Michael Silverman can be reached at michael.silverman@globe.com.