Azerbaijan and Armenia trade accusations of breaking US-brokered truce

Ceasefire deal in Nagorno-Karabakh under threat as both sides allege breaches within hours of it coming into force

Azerbaijan and Armenian have accused each other of violating a new ceasefire in the countries' conflict over the mountainous enclave of Nagorno-Karabakh.

The truce, brokered by the United States and other western powers, had only just come into effect at 8am local time (4am GMT) on Monday when the defence ministry in Baku said Armenian troops had shelled villages in the Terter and Lachin regions.