It was beginning to look like Copenhagen would be a wash, but news is now coming in that a tentative deal has been reached.

Reporting from Copenhagen - Key international leaders have reached a tentative deal to reduce greenhouse gas emissions and curb climate change, the Los Angeles Times has learned, after the United States and China agreed to a method for recording developing nations’ pledges to limit emissions and ensuring those pledges are carried out.

Details of the agreement were approved in an evening meeting with President Obama, Chinese Premier Wen Jiabao, Indian Prime Minister Manmohan Singh and Brazilian President Luiz Inacio Lula da Silva, sources said.

Obama has scheduled a press conference in the host Bella Center to unveil the agreement.

A senior administration official said following the meeting that the parties had reached a “meaningful agreement.”

“It’s not sufficient to combat the threat of climate change but its an important first step,” the official said.