An 18-year-old has been arrested after allegedly killing two people during a bank robbery in Kentucky, and police say his social media posts led to his arrest.

Brailen Weaver is charged with armed bank robbery and firearms offenses that caused death, according to federal court records.

Weaver entered a branch of U.S. Bank in Berea on Thursday just before 2 p.m. and “immediately shot and killed a male victim” and then fatally shot a teller, according to an FBI affidavit filed in federal court Friday.

He checked multiple drawers in the bank and then fled, the affidavit said.…