WASHINGTON (AP) — Scam artists are preying on older people's fears by peddling fake tests for the coronavirus to Medicare recipients, a federal law enforcement agency warned on Monday.

And moving separately on another law enforcement priority, President Donald Trump signed an order directing a crackdown on large-scale hoarding that's intended to create shortages of critical goods and drive prices up.

Alerting seniors to fraud, the Health and Human Services inspector general's office said it has seen marketing schemes rapidly pivot to offering tests for COVID-19 and "Senior Care Packages" with...