MANILA - President Rodrigo Duterte on Thursday advised his critics to unite and form one group so he could "focus" on them, his latest call to dissenters as allies and supporters accused them anew of destabilization efforts.

"I would be happy, really, if they will start to merge into one command. Itong mga Komunista at itong Liberal (Party), at itong mga iba na gustong paalisin ako, mag-isa isa na lang kayo," he said in a speech in Malacañang.

He said forming a single group would be beneficial for his critics since they "share" ideologies.

"Isang grupo. I think you share the same ideological whatever. Para hindi na masyadong magkalat ang ano... we can focus on all of you," Duterte said.

Duterte had earlier claimed left-leaning groups have formed an alliance with the "yellows," or the political opposition, against him.

"Yellow" and the term "dilawan" refer to members, allies and supporters of the Liberal Party, which has used the color in its election campaigns since the administration of former President Corazon Aquino.

The President's allies have recently accused opposition figures of mounting an ouster plot.

• READ:Pro-Duterte groups target 'yellowtards', 'enemies of the state'

The Liberal Party has repeatedly denied such claims, asserting that dissent should not be taken as destabilization.