The United States and Britain have monitored secret sorties and communications by Israel's air force in a hacking operation dating back to 1998, according to documents attributed to leaks by former U.S. spy agency contractor Edward Snowden.
Israel voiced disappointment at the disclosures, which were published on Friday in three media outlets and might further strain relations with Washington after years of feuding over strategies on Iran and the Palestinians.
Israel's Yedioth Ahronoth daily said the U.S. National Security Agency, which specializes in electronic surveillance, and its British counterpart GCHQ spied on Israeli air force missions against the Palestinian enclave Gaza, Syria and Iran.