Flights to and from major airports across Iran have been suspended until 6 AM, April 15 due to security concerns following Saturday's missile and drone attack on Israel.

The spokesman of the Iranian Airports and Air Navigation Company, Reza Kargar, told ISNA that cancellations were reported in almost all airports including Tehran, Esfahan, Shiraz, Bushehr, Ilam, Sanandaj, Tabriz, Ardabil, Urmiya, Kermanshah, Khorramabad, Ahvaz, Abadan, Hamedan.

The CEO of Imam Khomeini International Airport City Company explained that "if the alert is renewed, flights will continue to be canceled, and in case the alert is not renewed, flights will resume."

The cancellations followed a massive Iranian drone and missile strike on Israel earlier Sunday that saw over 300 drones and missiles. It comes after an attack on the Iranian Embassy in Damascus on April 1; an attack that Iran has attributed to Israel. The strike killed two IRGC generals and several others.

Despite the scale of the Sunday attack, according to Israel, there were no reported deaths. The defense against the assault was supported by the US, UK, and France.

Besides the attacks launched from Iran, the Islamic Revolutionary Guard Corps (IRGC) has also coordinated missile strikes from Iraq, Syria, and Yemen.

Israeli Channel 12 TV on Sunday quoted an unnamed high-ranking Israeli official assuring that Israel is preparing a "substantial response" to the Iranian moves.