Indeed, one newspaper associated with the Assad regime, Tishreen, has even claimed that the attack was carried out by US and UK forces using ballistic missiles fired from Jordan. This report would appear to be somewhat improbable.....
Improbable, but not impossible. A decade ago, the Pentagon was studying use of conventional Trident SLBMs to attack hardened targets. However, this claim is just a Syrian fantasy, ginned up to feed propaganda to their people.