U.S. President Barack Obama (L) shakes hands with Estonian President Toomas Hendrik Ilves during a joint press conference after their meeting in Tallinn, Estonia, Sept. 3, 2014. U.S. President Barack Obama arrived Tallinn early Wednesday for a 12-hour visit to Estonia, where he met with Baltic State leaders.(Xinhua/SERGEI STEPANOV)

TALLINN, Sept. 3 (Xinhua) -- US President Barack Obama ended his 12 hours visit to Estonia on Wednesday afternoon reaffirming the US and NATO's alliance with Estonia and the other two Baltic states, Latvia and Lithuania.

During his tight and short stay in Tallinn, capital of Estonia, Obama delivered a keynote speech assuring that they (US and NATO) would guarantee the safety and security of Tallinn, Riga and Vilnius as they have given the assurance to Berlin, London and Paris.

After meeting with Estonian President Toomas Hendrik Ilves, he also met Latvian President Andris Berzins and Lithuanian President Dalia Grybauskaite and had a joint press briefing.

He also had a meeting with Estonian Prime Minister Taavi Roivas and other members of the Estonian Government.

Obama had made a short talk to some 200 US and Estonian military service members at the Tallinn Airport before he winded up his 12-hour-long visit and departed for Wales, the UK for the NATO summit on Sept. 4 and 5.