KUALA LUMPUR - MALAYSIAN opposition leader Anwar Ibrahim on Tuesday demanded the government quash sodomy accusations against him, saying he was the victim of a 'conspiracy' to prevent him from seizing power.

Mr Anwar, a former deputy premier who spent six years in prison on sodomy and corruption counts before a stunning return to politics in March elections, said he was still on track to form a government with the help of defectors.

'This government is under siege,' he said, adding he was targeted because of 'the close possibility of me taking over' and his plans to re-enter parliament through a by-election, which had now been delayed.

'I will advise them to drop the charges because they are frivolous and malicious. I will fight every inch, I will fight them and fight them hard. This is a second round of dirty games,' he told a press conference.

Mr Anwar laid into the government of Prime Minister Abdullah Ahmad Badawi a day after emerging from the Turkish embassy where he fled over the weekend saying his life was in danger.

He filed a complaint against the police chief and attorney-general, and planned a public rally for Tuesday night as well as a national roadshow to attack the allegations

Mr Anwar said he expected that evidence would be fabricated to back the charges, leveled by a 23-year-old man who had been a volunteer in his office for several months.

'I have all the evidence and an alibi. This is a conspiracy,' he said, adding that his wife Wan Azizah Wan Ismail would meet with Mr Abdullah on Tuesday to push for an end to the accusations which are being probed by police.

Mr Abdullah's United Malays National Organisation (Umno) helms a national coalition that has ruled the country since the former British colony won independence after World War II.

The opposition alliance made a surprisingly strong showing in March, grabbing one-third of the seats in parliament and undermining the coalition's longtime hold on power in this nation of 25 million.

Mr Anwar was sacked as deputy prime minister in 1998 in the midst of the Asian financial crisis which heightened his power struggle with then prime minister Mahathir Mohamad.

Shortly after, he was charged with sodomy and corruption, and appeared in court with a black eye after a beating from the police chief.

As part of his current fight back, Mr Anwar filed a complaint on Tuesday at a police station over that beating a decade ago, accompanied by 50 supporters who scuffled with police.

It alleged that the current police chief, who was then the investigating officer, and the attorney-general, who was then the prosecutor, falsified the investigation into the assault.

Mr Anwar spent six years in jail until the nation's highest court overturned the sex conviction. He emerged in poor health and spent several years recuperating and working as an academic.

Analysts say the new allegations could actually help Mr Anwar, by galvanising support for the charismatic figure whose colourful political career has nevertheless been tinged by scandal.

'A large number of people do not believe the allegations, and this whole episode may have benefited Anwar more than it has damaged his reputation,' said Mr Ibrahim Suffian, a pollster from the Merdeka Centre.

The United States said Monday it would oppose any politically motivated investigation or prosecution of Mr Anwar and that it hoped there was no 'pattern' in the new accusations against him.

'The main point for us is that the rule of law needs to stand above politics,' said US State Department spokesman Tom Casey.

Deputy Prime Minister Najib Razak hit out at the comments.

'This has never been politically motivated at all, never crossed our minds. Washington had better get their facts rights,' he said. -- AFP