The Muslim Brotherhood accused Jordanian authorities on Tuesday of "direct interference" in the country's parliamentary elections, urging citizens to boycott the upcoming polls.
Jordan's largest political force accused Amman of encouraging an "atmosphere of fraud" and committing practices ranging from voter fraud to intimidation.
Some 2.3 million out of 3 million eligible voters are registered for the January 23 elections, set to be Jordan's first since the outbreak of the so-called Arab Spring uprisings in early 2011.
"Intelligence services in Jordan interfere directly in appointments and elections and do not even allow free elections at universities," Hamzeh Mansour, secretary general of the Islamic Action Front, the Brotherhood's political branch in Jordan.
Among various infractions, Mansour told reporters that security services approached the secretary general of an opposition party, offering three seats in parliament in return for support of Amman's policies.
The Islamist movement also cast doubt over the ability of the judiciary to uncover voting fraud in the polls, noting that all judicial appointments have been hand-picked by the king.
"There is no independent judiciary in Jordan as the executive authority places extreme pressure on the courts and appoints the chief justice, judges and dictates the way they approach their cases," Mansour said.
"Even if a case reaches a court they will likely receive a special or public pardon."
According to the government, the country's Independent Electoral Commission has referred eight cases of suspected voter fraud to the courts this month.
Meanwhile, security services announced on Monday the arrest of four citizens in connection with the selling of over 800 counterfeit voter IDs.
Although no convictions have been handed down, citizens have claimed widespread vote-buying in the lead-up to the polls, with some candidates offering between 75 and 1,000 dollars per vote.
On Tuesday the Brotherhood reiterated calls for constitutional amendments transferring the monarch's authority to appoint governments to the people - the core grievance of Jordan's two-year-old protest movement.
It also renewed its calls for citizens to boycott the polls, urging citizens to take part in a planned "mass anti-elections protest" in Amman on Friday.
The Brotherhood is spearheading a national boycott of the polls, in which some 1,5000 citizens are competing for a mandate in the 150-seat lower house of parliament.
Islamists hope the rally will be the largest ever witnessed in Jordan, which has seen some 7,000 anti-government demos and sit-ins since January 2011.
In addition to constitutional amendments, activists have called for changes to the electoral system, which they claim favour regime loyalists at the expense of political parties.