United Airlines has announced that it has suspended all flights to Tel Aviv for the foreseeable future and will only resume them once it’s safe for customers and crew, Al Jazeera reports.

The Chicago-based airline had already suspended its Newark to Tel Aviv route on July 31, citing security concerns.

Rival airline Delta has also halted its flights between New York and Tel Aviv until August 31, while Germany’s Lufthansa has suspended flights to the Israeli capital, Tehran in Iran and Beirut in Lebanon until August 12.