Erdoğan, Putin discuss latest developments at Istanbul meeting

The Turkish and Russian presidents met in Istanbul to inaugurate the dual natural gas line connecting their countries that will open up a new export path for Russian gas into Turkey and Europe.

Presidents Recep Tayyip Erdoğan and Vladimir Putin also discuss Syria and Libya, where the two leaders support opposing sides, while addressing regional tensions in Iraq and Iran, which have escalated with the American killing of a top Iranian commander.

With TurkStream, Russian gas will pass through the Black Sea to Turkey. Together, the two 930-kilometer (578-mile) lines under the Black Sea, along with the Russian and Turkish onshore pipes, will have the capacity to carry 31.5 billion cubic meters (1.1 trillion cubic feet) of natural gas annually.

Russia is the top gas supplier to Turkey, which relies on imports for its energy needs, transporting gas through another pipeline under the Black Sea called Blue Stream and the onshore West Line through Ukraine. Relations remain tense between Moscow and Kyiv with years of conflict and TurkStream allows Russia to bypass Ukraine by opening up a second direct transport line to Turkey.

From Turkey, Russian gas will reach southern and southeastern Europe through new and existing lines.

Erdoğan and Putin talk and meet often, cooperating on trade, energy and defense industries, while engaging in negotiations on the Syrian civil war and now also on Libya.

Backed by Russia, the Syrian regime's all-out offensive to retake Idlib —the last rebel-held stronghold in Syria— has pushed hundreds of thousands of civilians towards the closed Turkish border, risking a major new refugee flow to Turkey.

Putin is in Turkey following a visit to Syria where he met Bashar Assad. Turkey has supported rebels opposing Assad in the country's eight-year civil war.

War-torn Libya is now another location where the two leaders will try their diplomatic influence and negotiations. Turkey has moved to send Turkish soldiers and weapons to support the weak U.N.-recognized Tripoli-government while Russia has backed the rival eastern-based forces of Gen. Khalifa Haftar.

Serbian President Aleksandar Vucic and Bulgarian Prime Minister Boyko Borisov are also expected to attend the ceremony.

Security measures are high in the city, as a total of 7,200 police officers are on duty for the inauguration ceremony.

Among security forces are 300 special operations teams, 30 bomb squad working around the hotels where foreign leaders are staying or on the routes they are traveling before and during the event.

Also, three police helicopters, four marine boats, four specially trained dogs and 30 armored vehicles are supporting the Turkish security forces.

Following the ceremony, Erdoğan is later to host leaders of Russia, Serbia and Bulgaria in a dinner.

TurkStream natural gas pipeline project, which will carry natural gas from Russia to Europe via Turkey, is considered a further step in Turkish and Russian relations in terms of energy.

The TurkStream natural gas pipeline has a total capacity of 31.5 billion cubic meters, out of which the first line will carry 15.75 billion cubic meters of Russian gas to Turkish consumers.

The second line will carry another 15.75 billion cubic meters of gas to Europe via Turkey.

BOTAŞ built the first line that will connect to Turkey's existing gas grid, while the second line, to be operated by a Gazprom-BOTAŞ joint venture, will stretch to the Turkish-European border in Turkey's Thrace region.