In addition Lebanon, Israel and neighbouring Jordan, which lies between Iraq and Israel, said they were closing their airspace on Saturday night and Jordan announced a state of emergency.
Syria, an ally of Iran, said it was putting its ground-to-air defence systems around the capital and major bases on high alert, army sources there said.
Iraq has also announced that it is closing its airspace and suspending all air traffic after Iran launched a drone attack on Israel.
“Iraq’s airspace has been closed and air traffic has been halted,” Transport Minister Razzak al-Saadawi tells state news agency INA. The Civil Aviation Authority says the closure will last from 11:30 pm (2030 GMT) until 5:30 am (0230 GMT).
Jordan’s government spokesperson has denied the kingdom announced a state of emergency, and says media reports it did were baseless and “there was no cause for concern among its citizens.”