Dozens killed as Armenian and Azerbaijani forces clash for second day

Fighting prompts international calls for immediate ceasefire in dispute over breakaway region

• What is happening in Nagorno-Karabakh and why does it matter?

Dozens of soldiers have been killed in the second day of clashes between Azerbaijani and Armenian forces over a disputed south Caucasus region, with international calls mounting for an immediate ceasefire.

Civilians have also been killed and are said to be among the hundreds wounded in the fiercest clashes since 2016 in an area that provides crucial transit routes for gas and oil to the international market.