Israel closed its Taba border crossing to the Sinai peninsula on Monday following warnings by its anti-terrorism office of an “imminent” militant attack there and urged its citizens to leave Egypt hours before the start of the Passover holiday, when Sinai is a popular destination for many secular Israelis. Soon after the announcement, sirens wailed in parts of southern Israel alerting residents to a rocket attack.

The military said a rocket fired from Sinai exploded in southern Israel, hitting a greenhouse but causing no injuries. The Islamic State group later claimed responsibility for the attack. Yisrael Katz, Israel’s transportation and intelligence minister, said in a statement Monday there was intel regarding a potential “terror attack” against tourists in the Sinai peninsula. The crossing remains open for those wanting to return from Egypt. MORE