The camp of Vice President Leni Robredo on Monday, April 11, challenged Senator Panfilo Lacson to reveal the name of the person who asked him to withdraw in favor of the vice president.

Although the lone female presidential bet is still open to unity talks with her fellow candidates, Robredo’s spokesman Barry Gutierrez stressed that there had been “no active effort” on their part to pursue such talks.

“Well, you know, if somebody is talking to him, he should reveal who this person is because it is certainly not from our camp,” he said on CNN’s “The Source.”

“We are not pursuing any active efforts to talk to him. We are certainly not asking or even floating the idea of a possible withdrawal on the part of Senator Pangilinan, so I don’t know who this person claiming to actually be able to do this and what this entire thing is all about. Certainly, this is not from our end,” Gutierrez added.

He said that the senator should be the one to offer proof to his claims and that he was again “speculating” when he claimed similar offers were made to presidential candidates Senator Manny Pacquiao and Manila Mayor Isko Moreno.

This came after Lacson alleged that someone from the Vice President’s camp approached and asked him to withdraw and give way to Robredo, and that the campaign will adopt Senate President Vicente “Tito” Sotto III as a vice president.

READ: Lacson says he has 'lost respect' for Robredo

The senator, who did not present any evidence for his claim, also said that he was assured Pangilinan will withdraw his vice-presidential bid.

Gutierrez disputed the claims, saying that the campaign’s main focus is to ensure a Pangilinan win.

“We have been very, very clear on our position, particularly on the vice president, that her running mate of choice, the only vice president she is campaigning for and has no intention of withdrawing is Senator Kiko Pangilinan,” he added.

While it is no secret that before Robredo made efforts to unite the anti-administration forces before she eventually filed her Certificate of Candidacy (COC) for the president, Gutierrez maintained this is not something that the campaign is actively pursuing anymore.

“Now, I am not discounting the possibility that there are other people talking to different camps, but again, that is not coming from us,” he said, adding that the Robredo camp will only be “open to conversations if they’re the ones who want to talk to us.”

Gutierrez admitted that unity will help boost Robredo’s campaign, but for now, “we just have to wait and see.”

Lacson’s remarks came amid Robredo’s rallies that drew tens of thousands of her supporters and after she posted a +9 percentage points in the latest presidential preference survey by Pulse Asia.

While Lacson did not substantiate his allegations, Pacquiao made a similar claim of someone asking him to withdraw for Robredo.

READ: Pacquiao says emissaries from Robredo camp asked him to withdraw