“The facility at Masyaf also produces chemical weapons and explosive barrels that have killed thousands of Syrian civilians,” Yadlin said in the tweet.
There was no independent confirmation that this was the target but the United Nations has said in the past that the Syrian government has carried out chemical weapons attacks, which Damascus denies.
Israeli officials have also previously said that Israel and Russia, another Assad ally, maintain regular contacts to coordinate military action in Syria.
Jets flying over Lebanon overnight broke the sound barrier and Lebanese media reported that some Israeli jets had breached Lebanese airspace.
