Prosecutors to probe vice-speakership race

But Tseng Yung-chuan (曾永權), the KMT's campaign strategist, dismissed the allegations.

"The KMT has never been involved in vote-buying," Tseng said. "How would we have any extra time or effort to spare when we were busy soliciting votes?"

Meanwhile, the DPP caucus said it was investigating which party member cast an invalid ballot in the second round of the vice speakership race.

"As soon as we find out who that person is, we'll definitely revoke his or her membership," said DPP lawmaker Chou Po-lun (周伯倫), who was Hong's campaign strategist.