Thousands of Islamists demonstrated in central Amman to demand reforms on Friday, just hours after King Abdullah II dissolved parliament and called early polls without any major political change, AFP reported.

“We demand constitutional reform before the people revolt. The people want to reform the regime,” the demonstrators chanted in the demonstration held outside Al-Husseini mosque in downtown Amman.

AFP correspondents estimated the crowd to number 15,000.

“Democratic electoral law, constitutional changes, parliamentary governments, independent judiciary, constitutional court, effective anti-corruption efforts and preventing security services from interfering in political life,” read a large banner carried by protesters spelling out their demands.

Police said they prevented a group of youths from attacking the demonstrators, after they arrested eight people who were found to be carrying firearms in three minibuses heading into central Amman.

“We have been protesting for more than 20 months and you still do not understand our demands. We do not like demonstrations but we love Jordan,” read another banner carried by the protesters.

The demonstration was the latest in a series of protests in Jordan since January 2011 to call for political and economic reforms and to demand an end to corruption.

“We demand genuine constitutional reform that would help empower the Jordanian people,” Hammam Said, leader of the Muslim Brotherhood, told the demonstrators.

“We will not take part in the elections because we demand parliamentary governments and a real parliament.”

The king decided to dissolve the chamber of deputies on Thursday and to call early elections, the royal palace said. It gave no date, although the monarch has said he wants polls to be held by the end of 2012.

The opposition Muslim Brotherhood decided to go ahead with its planned rally in central Amman after Friday prayers, with the group hoping for a turnout of 50,000 supporters.

“Obviously this demonstration represented no one but the Muslim Brotherhood,” Information Minister and government spokesman Samih Maaytah told AFP.

“If this was the best gathering they could come up with, then the Islamists should really consider taking part in elections and join parliament to seek reform there instead of on the streets.”

A rival demonstration in support of the king’s plans was “postponed indefinitely … to avoid any problems,” said an organizer, Jihad al-Sheik.

The Brotherhood has said it would boycott polling as it did Jordan’s last elections in 2010 to protest a lack of meaningful reforms. It demands a parliamentary system where the premier is elected rather than named by the king.

King Abdullah recently urged his country’s Islamist opposition to take part in upcoming elections, despite their dissatisfaction with reforms.

He made the appeal in a rare interview on Jordan TV in July, as part of his attempt to engage with the Islamic Action Front, the political arm of the Muslim Brotherhood.