Cairo , Egypt ( CNN ) -- Egypt 's largest opposition group , the Muslim Brotherhood , will boycott runoff parliamentary elections scheduled for Sunday , a member of the party said Wednesday . Mohamed Beltagy , a member of the Muslim Brotherhood and a former legislative candidate , said the boycott is a protest against irregularities in the first round of voting last Sunday . The party was wiped out Sunday , going from 88 seats in the legislature to zero . Egypt 's ruling National Democratic Party won 217 seats in the first round of voting , the semi-official Al-Ahram newspaper said . The opposition parties won a mere handful of seats in the 508-seat parliament . Twenty-seven candidates affiliated with the Muslim Brotherhood qualified for runoff elections . Muslim Brotherhood candidates run as independents because the group is illegal under to Egyptian law , which bans parties based on religion . The runoff will involve 377 candidates from the National Democratic Party of longtime President Hosni Mubarak . On Tuesday , the administration of U.S. President Barack Obama criticized the elections , saying there had been `` numerous reported irregularities '' and `` restrictions on basic freedoms . '' National Security Council spokesman Mike Hammer called the reports `` worrying '' and said the United States is `` disappointed . '' Critics had predicted that Sunday 's race would be tainted by fraud and intimidation , but the government declared it `` a success . '' Egypt 's official MENA news service reported that 6,000 members of 76 civil groups monitored the elections . The country rejected international monitoring of the vote as interference in its internal affairs . Egyptian election commission spokesman Sameh al-Kashef said Tuesday that , although the committee had received numerous complaints , irregularities did not affect the results of the election . The complaints included reports of riots , fraud and forgery , denying citizens their right to vote , and difficulties faced by the media . There were riots in 16 constituencies , he said . He said voter turnout was 35 percent . Various opposition groups have accused the ruling National Democratic Party of using its power to suppress voices critical of Mubarak 's nearly three-decade rule . The ruling party has dismissed the accusations . CNN 's Ben Wedeman contributed to this report .
NEW : The largest opposition group is protesting irregularities in the first round . The Muslim Brotherhood finds its parliamentary presence reduced to zero . The United States has criticized the elections . The irregularities did not affect the results , an election official says .