The chairman of the U.S. Joint Chiefs of Staff met with senior defense officials in Israel during a short and unannounced visit there amid rising tensions in the region.

Army Gen. Mark Milley discussed “regional security challenges” with Israeli military’s chief of staff, Lt.-Gen. Aviv Kochavi, and Defense Minister Benny Gantz, among others, The Associated Press reported. Milley also spoke by videoconference from the base with Prime Minister Benjamin Netanyahu.

His visit came at a time of Israel’s escalating tension with Iran, cross-border incidents with Lebanon and airstrikes on Syria blamed on Israel.