Egypt tried to block the broadcast of an interview by CBS News with President Abdel Fattah el-Sisi about his covert military cooperation with Israel, the network said Friday. The network refused and will broadcast the interview on Sunday.

The attempt to stop the broadcast was the latest indication of the growing tension between Egypt’s public hostility and its private collaboration with the Jewish state.

Egyptian officials and the state-owned Egyptian media continue to rail against Israel as a dangerous enemy, and as recently as 2016 the Egyptian Parliament voted overwhelmingly to expel a lawmaker for the offense of hosting a dinner with the Israeli ambassador to Cairo. (A fellow member of Parliament was so outraged he threw a shoe at the culprit.)

Outside of public view, however, Egypt’s military and intelligence agencies have worked closely with their Israeli counterparts for nearly four decades, since the Camp David treaty of 1978. That cooperation has grown far closer since the military coup that brought Mr. Sisi to power in 2013.