PETALING JAYA (THE STAR/ASIA NEWS NETWORK) - Controversial sex blogger Alvin Tan on Sunday challenged Malaysia's government to revoke his passport, hours after the Home Minister Ahmad Zahid Hamidi said his ministry would do so as early as Monday.

"Just do it," wrote Tan in a caps-locked and profanity-laden Facebook post. He also called Zahid a "coward".

Tan, a 26-year-old former National University of Singapore scholar, jumped bail earlier this year after claiming trial to three charges under the Film Censorship Act, Sedition Act and the Penal Code.

Together with his ex-partner Vivian Lee, Tan faces charges over a controversial blog and for uploading pornographic images. The pair first gained notoriety in 2012 when they uploaded explicit videos of themselves having sex on their blog.

Zahid, the Home Minister, said earlier on Sunday the department has the power to cancel Tan's travel document as it is considered government property.

"It (passport) can be revoked under the Immigration Act and we will do it as soon as tomorrow (Monday)," he told a press conference at the launch of the Special Task Force for Anti-vice, Gaming and Gangsterism (STAGG) at the Forestry Research Institute Malaysia (FRIM) on Sunday.

The minister's warning followed a Facebook post by Tan where he questioned the revocation of opposition leader Anwar Ibrahim's state award by Selangor Sultan Sharafuddin Idris Shah.

Tan and Lee still face two charges under the Film Censorship Act and Sedition Act for a "Ramadan greeting" that was posted on their blog last year.

Tan is applying for asylum status in the United States. He claims to be in California.