Germany's Merkel says very concerned about Navalny's health

Germany is very concerned about Kremlin critic Alexei Navalny's health, Chancellor Angela Merkel said.

"The German government, together with others, is pressing for him to receive adequate medical treatment," she told the Parliamentary Assembly of the Council of Europe on Tuesday.

Merkel also said that a Russian troop buildup on the border with Ukraine created an "alarmingly tense" situation, saying it was important to keep a dialogue going on the issue.