Chicago-based United Airlines is following rivals Delta and U.S. Airways in suspending flights to Tel Aviv until further notice.
“We are working with government officials to ensure the safety of our customers and our employees, and will continue to evaluate the situation,” a United spokeswoman said.
United has no direct flights to Israel from Chicago. It flies two flights daily to Tel Aviv from Newark Liberty International Airport.
The Federal Aviation Administration says it issued a notice prohibiting U.S. airlines from flying into or out of Ben Gurion International Airport for a period of up to 24 hours.
The FAA issued the notice to airlines soon after it learned that a rocket strike had landed about one mile from Ben Gurion airport.
Atlanta-based Delta said it was operating in coordination with the U.S. Federal Aviation Administration "to ensure the safety of our customers and employees." The flight stoppages came after Hamas, the militant group that dominates in the Gaza Strip, and its allies fired more rockets into Israel, triggering sirens in Tel Aviv. One hit a town on the fringes of Ben-Gurion International Airport, lightly injuring two people, officials said.
Meanwhile, Casey Norton, a spokesman for American Airlines, said an inbound and outbound flight operated by its US Airways unit between Philadelphia and Tel Aviv were canceled.
Esther Castiel, who heads US Airways' operations in Tel Aviv, said the FAA had "issued a request not to travel to Israel. All U.S. carriers are stopping."
She added that it was not clear whether the travel halt was for one day or more.
A spokesman for Lufthansa said it was closely monitoring the situation, but that the German carrier has not yet decided to halt flights to Israel. British Airways, which flies to Tel Aviv twice daily, said its flights continue to operate as normal.
Israel's Civil Aviation Authority (CAA) said it was working with the FAA to ensure that Ben Gurion Airport was safe for foreign carriers despite a rocket fired from the Gaza Strip that landed on the fringes of the airport.
"We are working together with the FAA to demonstrate to them the level of confidence that we have in Ben Gurion Airport and to convince them to renew flights as soon as possible," Giora Romm, director of the CAA, said on Tuesday.
The three U.S. airlines that fly to Israel - Delta, United and American Airlines unit US Airways - said they temporarily suspended flights to Tel Aviv due to security concerns. European carriers have yet to follow.
Israel launched an offensive on July 8 to halt missile salvoes out of Gaza by Hamas, which was angered by a crackdown on its supporters in the occupied West Bank and suffering economic hardship because of an Israeli-Egyptian blockade.
Chicago Tribune and Reuters contributed to this report
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