Raging violence in the Thai capital claimed three more lives Saturday as gunfire and explosions echoed around tense streets where there have been pitched street battles between troops and protesters.
"The current situation is almost full civil war," said Jatuporn Prompan, a key leader of the protesters known as the "Red Shirts".
"I am not sure how this conflict will end," he said after almost two days of clashes between army troops and protesters left at least 17 dead, bringing to almost 50 the number of fatalities during the Reds' two-month protest.
An AFP photographer on Saturday saw the lifeless bodies of three people lying on the ground on a road north of the Red Shirts' vast encampment.
The circumstances of the deaths were not immediately clear but the military posted a sign declaring it a "live-firing zone".
Gunfire erupted elsewhere and smoke rose from burning tyres as a group of protesters faced off against troops in a separate area where major clashes occurred on Friday.
The neighbourhood of wide streets and embassies also includes a financial district and the Suan Lum night market popular with foreigners.
Police said hundreds of demonstrators had remained in that district despite a government operation Friday aimed at clearing protesters from the area after they had spilled out of their main encampment.
"The situation is under control and has been resolved in many spots but the military operation will continue because there are many thing to do to restore normality," government spokesman Panitan Wattanayagorn said.
Numerous M-79 grenades were fired at security forces in various areas on the fringes of the protest site overnight, he said.
The rally site, where demonstrators sleep on mats on the ground and listen to speeches and music blasted from giant speakers, stretches for several square kilometres. It is fortified with bamboo stakes and tyres.
According to the official Erawan emergency centre, the death toll from Friday's clashes was 16, all of them Thais, and most of them victims of gunshots. Another person had died on Thursday night.
"The toll keeps rising as street fighting was raging in the city until midnight," said an official from the centre.
The official toll did not include the three victims seen by AFP.
Emergency services said 141 people had been wounded, three of them foreigners from Canada, Myanmar and Poland. Their condition was unknown.
The France 24 television station earlier said one of its journalists -- a Canadian -- had been shot and gravely wounded. Two Thai reporters were also hurt, their employers said.
Thousands of anti-government protesters have essentially turned a large area of central Bangkok into occupied territory for two months, crippling an upscale retail and hotel district and disrupting daily life for ordinary residents in the city of about 12 million people.
The subway system and elevated train lines were shut on Saturday for safety reasons after the violence.
The mostly poor and working class Reds say the government is elitist and undemocratic because it came to power in a 2008 parliamentary vote after a court ruling ousted elected allies of their hero, former prime minister Thaksin Shinawatra.
Thaksin was unseated in a 2006 coup and lives in self-imposed exile to avoid a jail term for corruption.
The latest unrest began Thursday night after Prime Minister Abhisit Vejjajiva shelved a plan to hold early elections because the protesters refused to disperse.
The army then announced a military lockdown on the rally site, cutting telephone and electricity services.
Troops with Humvee vehicles descended on the area and used barbed wire to help seal off main roads surrounding the rally site. The army also warned it would deploy snipers around the Reds' protest base.
On Thursday night renegade general Khattiya Sawasdipol, a key Red Shirt supporter, was shot in the head near the rally site.
He was in a slightly improved condition Saturday but still in a critical state, said Chaiwan Charoenchokethavee, director of Vachira hospital.
Soldiers on Friday used tear gas and gunfire against the demonstrators who fought back with stones, slingshots and fireworks. Protest leaders said the Red Shirts were unarmed.
The unrest has sparked concern from the United States, United Nations and Canada, all of whom called for a peaceful solution.
At least 46 people have been killed and about 1,100 injured in Bangkok in a series of confrontations and attacks since the protests began in mid-March.
Thailand's revered King Bhumibol Adulyadej, 82, seen as a unifying force, has been hospitalised since September and has avoided commenting directly on the crisis in public.