NEW YORK (AP) — U.S. health officials ramped up warnings Thursday about a Massachusetts specialty pharmacy linked to a widening outbreak of a rare kind of meningitis, urging doctors and hospitals not to use any products from the company.

Investigators this week found contamination in a sealed vial of the steroid at the New England Compounding Center in Framingham, Mass., according to Food and Drug Administration officials.

Tests are under way to determine if it is the same fungus blamed in the outbreak that has sickened 35 people in six states. Five of them have died. All received steroid shots for back pain.