( CNN ) -- The head of Malaysia 's police force has warned opposition supporters they face arrest if they attend a rally Wednesday evening organized by losing candidate Anwar Ibrahim . Inspector-General of Police Tan Sri Ismail Omar said the rally was illegal because organizers did n't apply for a permit . `` The organizer must comply with the Peaceful Assembly Act 2012 . Marching without permit aimed at arousing anger is wrong according to the law , '' Ismail said , according to the country 's state-run news agency Bernama . According to a statement from Anwar 's Pakatan Rakyat ( PR ) coalition , the event is being held at a private location so is not bound by the law . The group said it had informed police but there was no need for a permit . Anwar has slammed the outcome of Sunday 's general election , which extended the 56-year rule of the Barisan Nasional coalition , giving it a simple -- albeit reduced -- majority of 133 of 222 parliamentary seats . PR won 89 . `` Our conscience can not allow us to accept election results conjured through frauds and cheating . A fight for clean and fair election remains the single most important fight that any Malaysian should relate to , '' Anwar said in a statement released Monday . He urged his supporters to wear black to the rally as a sign of mourning for Malaysia 's democratic process . A government spokesperson said on Tuesday that allegations of fraud in the election process were `` unsubstantiated '' and the government 's victory was in line with independent polling . `` Anwar claimed the only way he could possibly lose was if there was 'massive fraud ' , '' the spokesperson said in a statement . Prime Minister Najib Razak took his oath of office on Monday after 80 % of the electorate turned out to cast their vote . During the weeks leading up to the election , reports emerged of escalating violence , including beatings and death threats . Human Rights Watch also claimed that cyber-attacks had been directed at a number of Malaysian news websites , restricting access to reporting on the election within the country . Other allegations surfaced on polling day , with Anwar 's party and election observers alleging the government exchanged cash for votes and flew in foreigners to cast their ballots in favor of Barisan Nasional -- a charge denied by the government . `` We were told that 40,000 foreigners were being flown across Malaysia to vote . However , passenger manifests prove that a few hundred Malaysian citizens were flown to their home states , entirely legally , '' it said in a statement .
Head of Malaysian police warns rally participants they risk arrest . Najib Razak has called a rally Monday to protest against election results . Prime Minister Najib Razak was re-elected with 133 of 133 parliamentary seats . Najib Razak claims the election result was `` conjured through frauds and cheating ''