The Israeli government on Thursday urged its citizens to avoid travel to the United Arab Emirates (UAE) and Bahrain, citing threats of Iranian attacks, AP reported.

Iran has been threatening to attack Israeli targets since its chief nuclear scientist, Mohsen Fakhrizadeh, was assassinated last Friday near Tehran. It accuses Israel, which has been suspected in previous killings of Iranian nuclear scientists, of being behind the shooting.

In recent months, Israel has signed agreements establishing diplomatic relations with Gulf Arab states of the UAE and Bahrain—its first normalization deals with Arab countries in a quarter century.

The agreements, brokered by the Trump administration, have generated widespread excitement in Israel, and thousands of Israeli tourists are scheduled to travel to the UAE for the Jewish holiday of Hanukkah this month.

“In light of the threats heard recently by Iranian officials and in light of the involvement in the past of Iranian officials in terror attacks in various countries, there is a concern that Iran will try to act in this way against Israeli targets,” said a statement issued by the Israeli prime minister’s National Security Council.

It also advised against travel to Georgia, Azerbaijan, Turkey, the Kurdish area of Iraq, and Africa.