MANILA (2ND UPDATE) - Businessman and alleged Customs "middleman" Kenneth Dong was arrested on Tuesday by the National Bureau of Investigation (NBI) in connection with a rape case.

NBI agents arrest Kenneth Dong after Senate hearing in connection with a rape complaint pic.twitter.com/RZCfuhiaZu — Christian Esguerra (@IanEsguerra) August 15, 2017

The arrest happened after Dong and some NBI officials attended the Senate probe on the P6.4 shabu shipment from China.

The rape case against Dong was reportedly filed by a 33-year-old woman.

The complainant said the rape happened in Parañaque on April 10, 2016 in a place owned by Dong. She said she was intoxicated and possibly drugged when the incident happened.

Dong has denied the allegations.

NOW: @Gigi_Grande gives updates on the NBI serving an arrest warrant to Kenneth Dong for alleged rape. pic.twitter.com/jKfF6dVHxs — ABS-CBN News Channel (@ANCALERTS) August 15, 2017

Senator Richard Gordon, during the probe, hinted about Dong's "personal problem" but both refused to elaborate on the matter.

In a press conference on Tuesday afternoon, Justice Secretary Vitaliano Aguirre said a background check was conducted on Dong which led to the discovery of the impending warrant of arrest.

He said Dong was recognized by the complainant through social media.

Kenneth Dong na isinasangkot sa P6.4-B shabu shipment sa Valenzuela, dinala sa DOJ matapos maaresto sa kasong rape | via @RonLopezPH pic.twitter.com/TA1qZkrtkT — DZMM TeleRadyo (@DZMMTeleRadyo) August 15, 2017

The justice chief added that the court will decide where Dong, who is currently under the custody of the NBI, will be detained.

Aguirre added that the rape case is not connected to the ongoing Senate probe.

WHO IS KENNETH DONG?

The 33-year-old Dong found fortune and connections by selling industrial weighing scales. He then opened a construction business, and now owns a “luxury super club" in Cebu.

He was also campaign donor to senators Risa Hontiveros and Joel Villanueva in the last two elections.

Statements of Contributions and Expenditures show Dong donated P3 million and P5 million in 2013 and 2016 respectively for Hontiveros. He also contributed P3 million to the then-TESDA chief in 2016.

Hontiveros and Villanueva, along with other politicians, eventually became Dong's wedding sponsors.

Photos of Dong and presidential son Davao City Vice Mayor Paolo Duterte surfaced on social media, prompting critics to suggest that the younger Duterte could be involved in illegal activities.

Mark Taguba, a private Customs broker, earlier said he heard about a "Davao Group" that was backed by a "Vice Mayor."

The Davao official already dismissed the allegations as mere hearsay. Dong, for his part, said Vice Mayor Duterte was just an acquaintance he met through his weighing scale business.--with reports from Christian Esguerra and Gigi Grande, ABS-CBN News