(CNN) - Even as the Federal Aviation Administration lifted its ban on U.S. flights to and from Tel Aviv, two U.S. officials say the facts on the ground in Israel are the same as they were before the FAA freeze was put into place.
A State Department official says, "The circumstances in Tel Aviv from 72 hours ago are no different than the circumstances now."
Another U.S. official cautions they are keeping a close eye on the situation in Tel Aviv and "if this goes south the ban could go back into place."
The initial ban was put in place after a Hamas rocket hit a building less than a mile from the airport.
Just Thursday, the Israeli military said five rockets aimed at Tel Aviv were intercepted. A CNN team on site at the airport witnessed the firing off of an Iron Dome intercept.
Sources say the FAA, the U.S. Intelligence community and other U.S. government agencies have been in intense discussions with Israel since the ban was put into the place Tuesday.
“There was significant new information about the threat - new information/intelligence about the threat which they took into account, which led to the rescinding of this notice, and also measures - new measures the government of Israel put in place to mitigate potential risks to civilian aircraft and aviation,” State Department spokeswoman Marie Harf said Thursday.
But one of the officials says lifting of the ban "was not so much new intelligence as much as it is a better understanding of the planes going into and out of the airport."
The official says the Israelis improved certain protocols and procedures after the ban and were able to share new information with the United States about their defense capabilities that convinced the U.S. to resume air service into the Tel Aviv airport.
"We had a higher comfort level with the way they proposed to mitigate the threat we were seeing and it was satisfactory enough to allow airliners to resume," the official says.
But the top senator on the intelligence committee suggested to CNN that she is wary of the return of U.S. airliners to Israel. Sen. Dianne Feinstein said that while Israel’s missile defense system Iron Dome has a success rate of 86%, there is still a 14% chance a rocket could get through.
“I really regret that this has become a hot-button issue. It’s very important that civilian airlines be protected,” the California Democrat told CNN’s Dana Bash on Thursday.
Additionally, the U.S. official says that the decision to put the ban into place did not have anything to do with the Malaysian jet going down in the Ukraine and that there were many discussions that took place before the plane crashed about the U.S. threshold for flying into Tel Aviv.