The French and American heads of the Minsk Group, which led talks on the conflict for decades but failed to achieve a lasting agreement, met with Azeri President Ilham Aliyev in Baku on Saturday.
Azerbaijan's army paraded military hardware and weapons seized from Armenia during the six-week war through the capital Baku ahead of Erdogan's arrival to rehearse for a large-scale victory parade on Thursday.
Clashes over Nagorno-Karabakh broke out between the ex-Soviet rivals in late September, reigniting the long-simmering conflict over the mountainous region.
"To date, our forensic service has examined the corpses of 2,317 dead servicemen, including unidentified ones," says Armenian health ministry spokeswoman Alina Nikoghosyan.
The Azerbaijan Foreign Ministry explained that the horrific mistake occurred due to the fact that the helicopter flew in close proximity to the Armenian-Azerbaijani border
The truce agreed on Saturday came into force at midnight (2000 GMT) after a week-old Russian-brokered ceasefire failed to halt the worst fighting in the South Caucasus since the 1990s.
He reiterated that Pakistan stood with Azerbaijan in its quest to resolve Nagorno-Karabakh issue as per the United Nations Security Council’s resolutions.
Armenia denied that it had directed fire "of any kind" towards Azerbaijan, but the leader of Nagorno-Karabakh, an ethnic Armenian enclave inside Azerbaijan, said his forces had destroyed a military airbase in Ganja