KIEV (Reuters) - Fighting was taking place on Tuesday in the center of Luhansk, near Ukraine's border with Russia, between government forces and separatist rebels who have held the town since April, a Ukrainian military spokesman said.

"One district of the town has been liberated. Fighting is going on in the central part of the town," the spokesman, Andriy Lysenko, told journalists.

(reporting by Natalia Zinets; Writing By Richard Balmforth; Editing by Christian Lowe)