Officials in Azerbaijan and the separatist region of Nagorno-Karabakh say fighting is persisting a day after the worst outburst of hostilities in nearly 20 years killed 30 soldiers.

Nagorno-Karabakh, part of Azerbaijan, has been under the control of local ethnic Armenian forces and the Armenian military since a war ended in 1994 with no resolution of the region's status. The conflict is fueled by long-simmering tensions between Christian Armenians and mostly Muslim Azeris.

A spokesman for Azerbaijan's Defense Ministry, Vagif Dargyakhly, told The Associated Press on Sunday that Azerbaijani positions came under fire overnight and that civilian areas also were hit.

Nagorno-Karabakh's Defense Ministry said Sunday that Azerbaijan was using rockets, artillery and armor against the region.

On Saturday, Armenia said 18 soldiers were killed and Azerbaijan reported 12 dead.