Turkish President Recep Tayyip Erdoğan on Tuesday said there would be "no obstacle to the normalisation’’ of Turkey-Armenia relations if Yerevan demonstrates a sincere will with Azerbaijan.

Erdoğan made the remarks during a joint press conference with Azerbaijan's President Ilham Aliyev following an opening ceremony for an airport in Nagorno-Karabakh, Duvar news site reported.

The Turkish president said the environment was "more favourable than ever before" for lasting peace and progress towards normalization between Azerbaijan and Armenia,  noting that Karabakh’s borders must be determined and mutually recognized with Azerbaijan and its neighbours.

Turkey provided crucial military support to Azerbaijan during its conflict last year with Armenia over the disputed region of Karabakh. The conflict came to an end after a truce was brokered by Russia that allowed Azerbaijan to maintain swathes of Nagorno-Karabakh and deployed Russian peacekeepers to the region. 

Aliyev on Tuesday announced that Ankara and Baku have "a lot of projects" in Nagorno-Karabakh.

"We stand shoulder to shoulder with Turkey," Aliyev said. "We were together during the whole war and  we are (here) together today."

Diplomatic relations between Turkey and Armenia have been suspended since 1993 because of Armenia’s Nagorno-Karabakh conflict with Azerbaijan, which Turkey sided with Baku. The Armenian-Turkish border has also remained closed, since then. But the two sides in recent months have been exchanging positive messages.

Erdoğan in August said his country was ready to normalise relations with the Armenia after Armenian Prime Minister Nikol Pashinyan said that Turkey had been sending “positive signals” to his country and that Yerevan would respond in kind.