The heavy fighting broke out Sunday in Nagorno-Karabakh, which lies within Azerbaijan but has been under the control of ethnic Armenian forces
FDFA also said that Switzerland supported the OSCE Minsk Group co-chairs' efforts aimed at resolving the Nagorno-Karabakh conflict through dialogue
The clashes between Armenia and Azerbaijan, the heaviest since 2016, have rekindled concern over stability in the South Caucasus region, a corridor for pipelines carrying oil and gas to world markets
Armenian Foreign Minister held phone talks with US Deputy Secretary of State , discussing the flare-up of military hostilities in Nagorno-Karabakh
US Democratic presidential candidate Joe Biden has expressed concern over the flare-up of tensions in the disputed region of Nagorno-Karabakh
Armenia also claimed that two Azerbaijani helicopters were shot down and three Azerbaijani tanks were hit by artillery, but Azerbaijan's defense ministry rejected that claim
While Armenia said Azerbaijan initiated an air and artillery attack on Nagorno-Karabakh, Azerbaijan denied the statement saying it has just responded to Armenian shelling
Ministry spokeswoman Shushan Stepanyan also said Armenian forces hit three Azerbaijani tanks
The hostages include Armenia's deputy police chief and Yerevan deputy police chief
Negotiations were underway with the armed group in order to resolve the situation in a peaceful manner