Rick Wilking, Associated Press
U.S. Secretary of State John Kerry reacts to the blustery weather on arrival in Munich, Germany on Saturday Jan. 10, 2015. Kerry was to meet Sultan Qaboos of Oman in Munich before traveling on to India.

MUNICH — U.S. Secretary of State John Kerry stopped briefly in Germany on Saturday to meet with the ailing ruler of Oman, the Mideast country that's served an important intermediary role in negotiations over Iran's nuclear program.

Kerry, headed to India for an international conference, met for about 90 minutes with Sultan Qaboos bin Said, 74, who has been receiving medical treatment in Germany since November.

After the 90-minute meeting, Kerry tweeted that he was "grateful for strong friendship" with the sultan.

Among the topics they covered were the Iran talks, which are set to resume this coming week in Switzerland, the situation in Yemen, the Syrian civil war, the terrorist attacks in Paris and tensions between Israelis and Palestinians.

Oman hosted several secret meetings between U.S. and Iranian officials in the months leading up to an interim nuclear deal in November 2013.