Israel’s upgraded ballistic missile shield failed its first live interception test on Tuesday, security sources said, a fresh setback for the U.S.-supported system billed as a bulwark againstIran.

Operators of the Arrow 3 battery at Palmahim air base on the Mediterranean coast canceled the launch of its interceptor missile after it failed to lock on to a target missile fired over the sea, the sources said.

“There was a countdown to the launch and then nothing happened,” one source told Reuters on condition of anonymity. “A decision was made not to waste the interceptor missile.” […]