Muhammad Hamed / Reuters

Protesters from the Islamic Action Front and other opposition parties shout slogans during a demonstration after Friday prayers in Amman.

Updated at 11:33 a.m. ET: AMMAN, Jordan -- Around 2,000 people called for the removal Jordan's King Abdullah at a rally in downtown Amman on Friday in protest at fuel price hikes, in a marked escalation of street anger in the third day of demonstrations in the Western-backed kingdom.

One person was killed during demonstrations on Thursday.

PhotoBlog: Jordan protesters call for 'downfall of the regime'

"Go down Abdullah, go down," the protesters Friday chanted as police, some in riot gear, largely stayed away from crowd, near the main Husseini Mosque.

The crowed also chanted "The people want the downfall of the regime," the rallying cry of the Arab Spring uprisings that have shaken the Middle East and toppled leaders in Tunisia, Egypt, Libya and Yemen.

"Shame. Shame. Prices are spiking and Abdullah gambles," people shouted.

Criticizing the king in public is forbidden in Jordan and is punishable by up to three years in jail.

The Muslim Brotherhood, the country's largest opposition group, had called on people to take to the streets, but top officials from the group choose not to participate in the rally.

The 50-year-old king has ruled since 1999.

On Thursday, the protester was killed and scores were injured during an attack on a police station overnight in Jordan's second-largest city of Irbid, witnesses told Reuters. Police said they used tear gas to disperse masked youths who attacked government property.

Some protesters torched part of Irbid's municipal headquarters later on Thursday to vent their anger at officials who said the dead young man had been armed, the witnesses said.

Mohammad Hannon / AP

Protesters throw rocks at police during a demonstration at al-Baqaa Palestinian Refugee Camp north of Amman, Jordan, on Thursday.

Elswhere, hundreds of people blocked roads, set government buildings alight and trashed shops in the towns of Maan, Tafila, Salt and Karak.

Thousands chant 'revolution' in rare protest against Jordan's king

"The country has risen up from north to south and this state of popular tension is unprecedented," said Murad Adailah, a senior member of the Islamic Action Front, the political arm of the Muslim Brotherhood.

'Political crisis'
A staunch U.S. ally with the longest border with Israel, Jordan has not seen the kind of mass revolts that swept other Arab countries. The coming days will be crucial in testing whether the relative calm can continue.

Jordanians have held occasional protests inspired by the Arab Spring uprisings, demanding democratic reforms and curbs on corruption. But those gatherings were peaceful and the security forces did not use weapons.

Latest news on fighting in Israel and Gaza

Demonstrators sometimes chant against Abdullah but there seems to be little enthusiasm for revolution. The monarchy is seen as a guarantor of stability, balancing the interests of tribes native to the east of the Jordan river with those of the majority of citizens, who are of Palestinian origin.

But the price rises announced on Tuesday could boost the popularity of the Islamist opposition, emboldened by the successes of its ideological brethren in Egypt and Tunisia.

The government has warned Islamists not to take advantage of the tension caused by the price rises but they have never sounded more confident.

Muhammad Hamed / Reuters

A Jordanian police officer fires tear gas at protesters during a demonstration in Amman on Thursday.

"This is a huge political crisis and it has become clear that there is no more room to delay real and comprehensive reforms," said Jamil Abu Bakr, a Muslim Brotherhood leader.

Most of the civil unrest is in outlying areas inhabited by powerful tribes who are the original inhabitants of the country. They supply the army and security forces with recruits and form the backbone of support for the ruling Hashemite dynasty.

Full Middle East & North Africa coverage

Economic pinch
Prime Minister Abdullah Ensour said lifting hefty subsidies that cost at least $2 billion annually was unavoidable to avert economic collapse caused by a ballooning budget deficit and minimal foreign aid that normally keeps the economy afloat.

As a result of the changes, cooking gas will jump 54 percent, he said. Many low-income Jordanians use the gas for heating.

Some politicians say the monarch has been forced to take only cautious steps toward economic reforms, constrained by his tribal power base, which sees such measures as a threat to its political and economic privileges.

Complete World coverage on NBCNews.com

The palace has traditionally contained discontent by offering patronage, state jobs and other perks. Critics say that policy of placating constituents was not sustainable in a country that no longer enjoys large infusions of foreign aid.

The fuel price increase is aimed at securing a $2 billion loan from the International Monetary Fund.

Reuters and The Associated Press contributed to this report.

More world stories from NBC News:

• Wake-up call for Israel's city that never sleeps
• Cops pull over speeding driver, discover mobile office
• Analysis: Israel strikes old foe amid new realities of Arab Spring
• Images: Stuck behind the scenes as China changes leaders
• As Taliban regroup, victims battle for 'free' Afghanistan
• Analysis: Israel, Gaza slide closer to a war neither side wants
• New 'intelligence' body set to fight trade in world's treasures
• Understanding the beauty of Indonesia's 'Underwater Eden'
• Israel, Hamas take conflict to Twitter

Follow World News from NBCNews.com on Twitter and Facebook