PHILADELPHIA — The Philadelphia 76ers have decided not to build a $1.3 billion downtown arena, a surprising move that comes just weeks after the team received approval for the controversial project from the city council.

The Philadelphia Inquirer reported Sunday that multiple council members had confirmed the change in plans. The team has struck a deal with Comcast Spectacor to remain in the city’s sports stadium district, the newspaper said, but further details about the new proposal have not been released.

The 76ers, the mayor’s office and Comcast Spectator — which owns the Wells Fargo Center, where the team currently plays — did not respond Sunday to requests for comment. The team rents the arena from Comcast Spectacor, which also owns the Philadelphia Flyers of the NHL, who play there too.

The council had voted Dec. 19 to approve the downtown arena after more than two years of heated debate over the proposal, and the owners of the NBA team had hoped to move into what would be called 76 Place by 2031. The council vote came despite vocal opposition from nearby Chinatown residents and other activists.

“I’m so livid right now I don’t even know what to do,” Jimmy Harrity, an at-large member of the council, told the newspaper. Harrity, who supported the team’s move, said, “I feel as though I was used as a pawn.”

Mayor Cherelle Parker, a Democrat who had championed the plan, has said the entire city will benefit from what she called a “historic game-changing economic development project.” Supporters had hoped the 18,500-seat arena would help revive a distressed retail corridor called Market East, which runs from City Hall to the Liberty Bell. The area has struggled for years despite redevelopment efforts.

The team owner, Harris Blitzer Sports & Entertainment, had pushed for city approval by year’s end so it could meet the target opening date. It had vowed not to ask the city for any construction funding, although it was free to seek state and federal funds. Instead of property taxes, it would have paid about $6 million in annual payments.

Opponents feared the arena would bring gridlock on game days as well as gentrification and rising rents to the area.

The Chinatown community has fought a series of proposed developments since the 1960s, including casinos, a prison, a baseball stadium and a highway, the last of which dissected the neighborhood when it opened in 1991.