German aviation group Lufthansa said Wednesday it was suspending services to Tel Aviv for another day over security concerns amid the escalating Gaza conflict, after halting flights for 36 hours.

The German company, which also operates Germanwings, Austrian Airlines, Swiss and Brussels Airlines, said it was "evaluating the security situation in close consultation with the responsible authorities".

It said it had cancelled a total of 20 scheduled flights to Tel Aviv on Thursday from Frankfurt, Munich, Cologne, Zurich, Vienna and Brussels.

"At the moment there is no reliable new information that would justify a resumption of flight service," it said in a statement.

The move came after Lufthansa Tuesday suspended services to the Israeli city for 36 hours "for the security of passengers and crew" amid the "unstable situation" at Ben Gurion International Airport.

Several major carriers made the same decision after a rocket fired from Gaza struck near the Tel Aviv airport.