A Philippine senator said he will surrender to authorities after a special anti-corruption court ordered his arrest on Monday on a non-bailable charge of plunder after he allegedly pocketed a huge kickback in a flood-control project in the latest crisis to hit the upper chamber.The special Sandiganbayan anti-corruption court had initially issued a warrant for Senator Jinggoy Estrada’s arrest on Friday on a corruption charge that was bailable. He then surrendered and was released on bail and again denied any wrongdoing.Estrada, 63, has strongly denied allegations mainly by a former government public works engineer that he received more than 570 million pesos (US$9.3 million) in kickbacks from flood control projects.Before leaving the Senate to surrender, Estrada suggested that the corruption cases he was facing and his arrest were a result of his being aligned with the camp of former president Rodrigo Duterte and his daughter, incumbent Vice-President Sara Duterte, a former ally but now an arch-political rival of President Ferdinand Marcos Jnr.Philippines Senator Jinggoy Estrada waves from his vehicle as he is escorted out the Senate on Monday. Photo: AP“I will not yield to threats. I will not be intimidated,” Estrada said at the Senate.“I will not be pressured into surrendering my independence of judgment,” he said.