They triggered the resignation of the Prime Minister, Saad al-Hariri, but talks to form a new government are deadlocked.
The clashes started when dozens of men, some wearing masks, pelted security forces with stones and threw firecrackers at them on one edge of the protest camp.
The rise in tensions comes as politicians have failed to agree on forming a new government.
The Red Cross and the Lebanese Civil Defense said at least 46 people were injured and transported to hospitals.
Some protesters tried to push through steel barriers blocking the way to the parliament and government buildings.
The violence Saturday started when young men from a neighborhood known as a stronghold for supporters of the Shiite Amal and Hezbollah groups attacked the epicenter of anti-government protests, chanting "Shiite, Shiite".
The afternoon clashes erupted when young counter-protesters from an area of the capital dominated by the powerful Shiite movement Hezbollah and fellow Shiite movement Amal tried to raid a key anti-government protest camp in Martyrs' Square.
It wasn't clear who the attackers were but the parliament speaker is the head of the Shiite Amal group.
The protesters have demanded a government made up exclusively of experts not affiliated to the country's traditional political parties, but analysts have warned this could be a tall order.
Mets and Rick Porcello agree on one-year, $10 million pact
He won the Cy Young with Boston in 2016 with a 22-4 record, 3.15 ERA and 189 strikeouts, walking just 32 batters in 33 starts. If that were the case, the Mets would have to go big-game hunting if it means giving up a highly-regarded arm like Thor's.
The names of various potential candidates have been circulated in recent weeks, but the Sunni Muslim establishment on Sunday threw their support behind Hariri returning.
Still, clashes have become more frequent in recent weeks, with supporters of Hezbollah and Amal attacking protest camps in several cities in counter-demonstrations. Dozens of protesters had travelled to Beirut from the northern city of Tripoli to take part in the parliament rally. Security forces chased protesters around central Beirut, some firing rubber bullets and several volleys of tear gas from armored vehicles.
The National News Agency reported that some shop windows in the commercial part of central Beirut were smashed by vandals.
Earlier this week, some lobbed firecrackers and burned a tent in the protest camp hosting discussions. On Saturday, critics of the attack organized a rally in support of the Hub, but cancelled it shortly before the attempted attack.
A preacher from the neighborhood mosque appealed to the men who attempted the attack to retreat.
Nasrallah said neither a government that only includes Hezbollah and its allies, nor one that only comprises its rivals, could pull the country from a crisis that "requires that everyone stand together".
Nasrallah's speech came a day after FPM leader and Aoun's son-in-law Gebran Bassil said the party would not join a new government under the terms set by Hariri, but would not obstruct the formation of a new cabinet.
Nasrallah said he would support a coalition government with "the widest possible representation" that did not exclude any of the major parties, adding that it could even be headed by Hariri.
Hassan Nasrallah said that the "anger" of some of his movement's members had gone "out of control" but stressed it had been quickly contained.
The actress said: 'Ryan [Reynolds] had a nice, normal upbringing, and we want our kids to have the same normal life that we had. The couple shared the first image of the tot in an Instagram post in October, with Ryan also revealing the gender.
There is no disputing that Richard Jewell was an innocent man whose reputation and life were shredded by a miscarriage of justice. Scruggs broke the story that the FBI was investigating Jewell, whose reputation was then tarnished by negative press coverage.
Jokic posted a double-double with 24 factors and 11 rebounds however Denver misplaced for the fourth time in 5 video games. Denver's Will Barton missed a 16-foot off-balance floater, and Taurean Prince grabbed the rebound and was fouled.
Le site en question ressemble fortement à un site officiel des douanes ou d'un transporteur (DHL, Colissimo etc.). Si vous pensez avoir été victime d'une escroquerie , vous pouvez faire un signalement sur la plateforme Pharo .
They are among up to 15 Australians killed by the heat, ash and toxic gases that enveloped the island following Monday's eruption. Families of victims of the White Island eruption embrace after arriving back to the Whakatane wharf following a blessing at sea.
Afternoon highs will range 3 to 6 degrees, but up at 7 or 8 at the coasts in mainly light southwest or variable breezes. There is also the possibility for thunder, with areas in the north of the country expect to be the worst hit.
Cette année, c'est Miss Guadeloupe 2019, Ophély Mézino , qui représentait la France, remplaçant notre beauté nationale. Mais c'était avant de réaliser qu'Ophély Mézino a tout de même fait un sacré parcours dans la compétition.
Reed has declared that he respects the Tour's decision and that they are all focused on winning the President's Cup . Well, it sounds like things may have hit a boiling point after Reed and Simpson were basically embarrassed by C.T.
The latest on Doncic is that he will not return to the game with what is reported to be a right ankle sprain . Doncic appeared to hurt his ankle while driving to the basket less than two minutes into the game.
Lamar Jackson and the Baltimore Ravens have been one of the best teams in the National Football League all season long. Jackson ran for 86 yards on eight carries to break Vick's 2006 single-season record for a quarterback of 1,039 yards.
Porsche’s electric Taycan barely clears 200 miles on a charge
It has a rating of 69 MPGe combined compared to 104 MPGe combined from the less efficient S model, which is the performance model. This is the first variant of the Taycan - Porsche's first all-electric vehicle - to receive an estimated range from the EPA.
Jets-Red Wings Sum
To say that he has had a more well-rounded game would be an understatement, and still, I want to know where the goals went. Defenceman Filip Hronek added an empty net goal to cap the victory for the Red Wings, who outshot the Jets 34-28.
Rapinoe backs Warren for 2020 election
Rapinoe tweeted: "So thrilled to be even a small part of this campaign!" "I feel like I trust her", said Rapinoe. Elizabeth Warren, D-Mass., on Friday, for "being bold and being real".