The Liberals are pushing for more information about scathing allegations made by the head of Canada's spy agency.

Canadian Security Intelligence Service Director Richard Fadden made headlines last month when he said in an interview with CBC that a number of unnamed Canadian politicians were believed to be under the influence of foreign governments.

On Monday, appearing before a Commons committee, Fadden said he would prepare a report in a month's time, offering more details on the allegations. However, he didn't promise the report would be made public.

Fadden hasn't named any politicians or specified the countries of concern, but he has hinted that China is on the list.

On Tuesday, Liberal government ethics critic Marlene Jennings took aim at Fadden and the feds, calling for the process to be sped up.

"These are very serious allegations and the Harper government owes it to Canadians to reveal the details immediately," Jennings said in a release.

"Mr. Fadden has singled out and tarnished the Chinese-Canadian community, yet instead of clearing the air, the Harper government remains silent."

The TV interview was broadcast just prior to the G8 and G20 meetings in Huntsville and Toronto, Ont., and just before Chinese President Hu Jintao arrived in Canada.

Jennings called the CSIS revelations an "embarassing bombshell" and called on Public Safety Minister Vic Toews to step in and expedite the CSIS review process and reduce the four-week timeline.

"No more sweeping this under the rug -- it's time for all the facts to be known so we can deal with this appropriately," she said.

The federal government has claimed Fadden didn't pass the information onto Ottawa, and that the televised report came as news to the government.

However, Fadden said the concerns he made public in the interview do not "constitute threats to the security of Canada," and he was therefore not required to inform higher authorities about them.

He also said the government has been aware for decades that CSIS is concerned about foreign influence, and even grants funds on an annual basis for CSIS to investigate the threat.