India, Sept. 14 -- The bullets used in the killing of conservative activist Charlie Kirk carried strange engravings. Investigators found both fired and unfired rounds with markings on them.

Utah Gov. Spencer Cox said the messages were on one fired casing and three unfired rounds in the magazine of a .30-06 bolt-action rifle. Police say 22-year-old Tyler Robinson fired the gun during Kirk's event at Utah Valley University on Wednesday.

"The rifle had a scope mounted on top of it. Investigators noted inscriptions that had been engraved on casings found with the rifle. Inscriptions on a fired casing read: 'Notices, bulges, OwO what's this?'" Cox explained Friday.

That phrase is known online as a meme tied to roleplaying and is linked with...