Several people have been taken away in ambulances after being loaded onto stretchers, RT's Irina Galushko reports from Istanbul.
The police are now tearing down the tents in Gezi Park camp, she added.
Scores of riot police have sealed off Taksim Square and stormed the adjoining park, pressing the protesters out of the area.
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Backed by armored vehicles, the police chased the people out, while dozens of workers with bulldozers started clearing out the remnants of the protester's camp from the square.
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Water cannon were used to keep the people off the square in the surrounding streets. Even ambulance workers, as well as reporters, have been denied access to Gezi Park, RT's Galushko tweets.
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Dozens of people have been injured amidst the police action, while clashes with sporadic tear gas broke out in the streets, Today's Zaman reporter Mahir Zeynalov tweets.
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Zeynalov, however, notes that only "limited" amount of tear gas has been fired, saying the police are "professional so far in Taksim."
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Meanwhile, some protesters spoke of a police "massacre," describing accounts of brutality in their Twitter posts, as several groups of protesters took shelter from tear gas in adjacent hotels.
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Istanbul's Taksim Square must be cleared of protesters before tomorrow's pro-government rally, Turkish Prime Minister Erdogan stressed in his Ankara speech earlier on Saturday.
"We have our Istanbul rally tomorrow. I say it clearly: Taksim Square must be evacuated, otherwise this country's security forces know how to evacuate it," Erdogan said in Ankara, as he announced the Sunday rally in support of his party AKP.
Tens of thousands of cheering Erdogan supporters gathered in suburban Ankara for a rally titled 'Respect for the National Will'.
© Reuters / StringerSupporters of Turkey's Prime Minister Tayyip Erdogan watch a rally organized by the ruling Justice and Development Party in Ankara June 15, 2013
Erdogan once again took a hard stance on the anti-government demonstrators, saying he has reasons to call them "marauders," and repeating the claims of protesters drinking alcohol in mosques and attacking women in hijabs.
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He also contrasted the violent unrest to the "peaceful" way his supporters act, praising them and the AK party members.
Erdogan then focused on a foreign support conspiracy, claiming the Turkish government has "all the evidence needed" of the "traitor scheme" behind the protests.
"We will make public with documents that the real issue was not Gezi Park. This is a coordinated process from the outside and the inside of the country," the Turkish Prime Minister said, adding that some "illegal organizations" were behind the various "schemes" from the very start of the protests.
He also praised police actions, saying that the Western countries and Russia had been even tougher in cracking down on protests and used "bullets," while the Turkish police have been "patient."
© Reuters / Dado RuvicTurkey's Prime Minister Tayyip Erdogan speaks during a rally in Sincan June 15, 2013.
"We will make public with documents that the real issue was not Gezi Park. This is a coordinated process from the outside and the inside of the country," the Turkish Prime Minister said, adding that some "illegal organizations" were behind the various "schemes" from the very start of the protests.
He also praised police actions, saying that the Western countries and Russia had been even tougher in cracking down on protests and used "bullets," while the Turkish police have been "patient."
He could well have a point on both accounts.