Pro-Russia forces have entered the city center of Ukraine's Lysychansk, which is completely surrounded, Chechen leader Ramzan Kadyrov said on Saturday on his Telegram channel, hinting that a full-scale attack on the city will begin soon.

The forces of the "Luhansk People's Republic (LPR)" and Russia have occupied all the strategically important heights around Lysychansk, encircling Ukrainian groups remaining in the city, Andrey Marochko, an LPR officer told TASS News Agency on Saturday. 

Assistant Minister of the Interior of the "LPR" Vitaly Kiselev told TASS that pro-Russia forces would take full control of Lysychansk in the next couple of days.

However, Ruslan Muzychuk, a spokesperson for Ukraine's National Guard, told Ukrainian TV that while fierce fighting is currently taking place near Lysychansk, the city itself is not encircled and remains controlled by Ukrainian forces.