MOSCOW - Russian President Vladimir Putin and US President Donald Trump will meet in a third country, with the date and venue to be announced Thursday, Kremlin aide Yuri Ushakov said Wednesday. Ushakov met with reporters following Putin's closed-door meeting with visiting US National Security Advisor John Bolton at the Kremlin. Ushakov said the summit may last several hours, with the two presidents first meeting tete-a-tete in the middle of the day and then together with delegations. In Washington, Trump said their meeting likely would take place after a July 11-12 summit of NATO leaders he is scheduled to attend. Ushakov said Putin discussed with Bolton priority issues that the presidents will address at the upcoming summit, in particular Syria and its humanitarian aspect.