WASHINGTON (AP) — Weapons analysts are poring over new videos from Syria that purport to show U.N. chemical weapons experts examining a recovered rocket fragment.

The rocket may have been used in the suspected nerve agent attack a week ago near Damascus. Analysts said the fragment appears to have come from a short-range artillery rocket commonly used by Syria’s army. That could complicate the goals of a U.S. missile strike because there are many such rocket launchers scattered across Syria.