Turkish Prime Minister Recep Tayyip Erdogan has entered into emergency talks with representatives of anti-government protesters after they rebuffed his ultimatum to leave Gezi Park in central Istanbul.

On Thursday, Turkish television showed around a dozen members of Taksim Solidarity entering Erdogan’s Ankara residence for their first face-to-face meeting.

Taksim Solidarity is the core group behind the campaign to save Gezi Park from demolition.

Earlier in the day, the protesters rejected Erdogan’s "last warning" to evacuate the park, which has been the center of mass anti-government rallies.

    "I'm making my last warning: mothers, fathers please withdraw your kids from there," he said in a live television broadcast on Thursday.

Negotiations with Erdogan come after the government announced its readiness to hold a referendum on a controversial development plan in Istanbul in an attempt to put an end to the ongoing protests in the country.

The unrest began on May 31 after police broke up a sit-in held at Taksim Square to protest against the proposal to demolish Gezi Park.

The death toll from clashes between anti-government protesters and police in Turkey has reached five. The latest victim was a 26-year-old protester who succumbed to injuries he had sustained on June 1.

Around 5,000 of the demonstrators have also been injured so far.

The protesters say the park, which is a traditional gathering point for rallies and demonstrations as well as a popular tourist destination, is the city's last green public space.

Amnesty International has censured the Turkish police for the tactics they have used to control the protests.