BRUSSELS, November 28. /TASS/. EU High Representative for Foreign Affairs and Security Policy Federica Mogherini will meet with Russian Foreign Minister Sergey Lavrov over Ukraine in Basel on December 4 on the sidelines of the Council of OSCE Foreign Ministers, a European diplomatic source told TASS on Friday.

The situation in eastern Ukraine and ways to settle the crisis will be the key issues of the meeting, the diplomat said.

The Council of OSCE Foreign Ministers will gather for a plenary session in Basel on December 4-5.