By Agencies

Pedro Pablo Kuczynski was due to face an impeachment vote on Thursday over corruption allegations.

Peru's president has offered his resignation to Congress after videos surfaced in which several of his allies were filmed allegedly trying to gain the support of a lawmaker in a vote on the leader's impeachment.

Pedro Pablo Kuczynski, 79, made the announcement in a televised address to the nation on Wednesday, a day before he was due to face an impeachment vote over corruption allegations. 

Kuczynski promised an orderly and constitutional transition of power. 

"I don't want to be an obstacle for the nation finding the path of union and harmony that it so badly needs and which was denied to me," he said. 

It was not immediately clear if Congress would accept the resignation.

On Tuesday, videos emerged apparently showing some of the president's backers allegedly trying to buy support of a lawmaker so he would block the Kuczynski's impeachment. 

The former Wall Street investor had been accused of covering up decades-old illegal payments from Brazilian construction giant Odebrecht.

The company became embroiled in a political scandal after admitting to paying more than $788m in bribes to win construction contracts across 12 countries, including Argentina, Mexico and Venezuela.

The accusations centre on Westfield Capital Ltd, a company owned by Kuczynski, which received $782,000 from Odebrecht, according to Peruvian national paper El Comercio.

Kuczynski has denied any wrongdoing.