Syrian Air
The move comes after Israel accused Iranian forces in Syria of firing rockets into the Golan Heights.
A Pentagon spokesman said there was no U.S. military activity in that area at this time.
The Syrian army says it shot down the F-16 jet that crashed in northern Israel.
The Trump administration is prepared to again take military action against Syrian government forces if necessary to deter the use of chemical weapons.
WHAT'S HAPPENING
The White House hinted at a new chemical weapons threat on Monday.
The Sednaya prison is a "human slaughterhouse," Amnesty International said earlier this year.
“Washington’s action created a threat to the lives of our servicemen who are fighting against terrorism."