Markus Junianto Sihaloho – The House of Representatives deputy speaker implicated in the country's latest sex video scandal claims it is a ploy to undermine his party ahead of the 2014 elections.

Anis Matta, from the Prosperous Justice Party (PKS), made the claim on Tuesday in response to a sex video posted on Twitter on Monday.

The 45-second clip, uploaded by the user "Fahri_Israel," features a naked man and woman engaging in sexual activity. It claims the man is Anis Matta.

However, Anis said this particular user had consistently used the account to attack the PKS. "This is slander," he said. "This is a personal attack against myself as the party's secretary general, and it is directed at the PKS itself."

He declined to say who the owner of the account was or which groups were trying to discredit the party. "It's better for the PKS to make no further comment on such an issue," he said.

Anis said the PKS had been trying to get its members to use social media such as Twitter and Facebook to consolidate its voter base, and he speculated that the sex video might have been uploaded to Twitter in a bid to disrupt the party's use of the medium for campaigning.

Mahfudz Siddiq, deputy secretary general of the PKS, said he and other party officials believed the video might have been posted in retaliation for the party's recent decision to back an ultimately failed bid to launch an inquiry into the tax office.

The PKS and the Golkar Party, both part of the coalition, were accused of breaking ranks with the ruling Democratic Party in pushing for the inquiry, which the Democrats voted against.

"I suspect the video might be related to the PKS's stance to uncover the tax mafia through the inquiry," Mahfudz said.

On Monday evening, the National Police said they were investigating the Twitter account where the video was first posted. "Since it was uploaded on Twitter, we will coordinate with the FBI because the server is located in the United States," a police spokesman said.

He added that police would attempt to determine who had uploaded the video and the identities of the naked man and woman featured in it, all of whom could be charged under the Information and Electronic Transactions (ITE) Law.

Similar sex tapes uploaded to the Internet last year and purported to show rock star Nazril "Ariel" Irham saw the Peterpan frontman sentenced to three and a half years in prison and fined Rp 250 million ($28,500).