One website headline writer summed this story up concisely and wittily: “It’s Not Delivery. It’s Glass.” That’s because DiGiorno pizza, the frozen pie brand with a famously catchy slogan, was one of three major brands—along with Stouffer’s lasagna and Lean Cuisine meals—listed in a voluntary recall of nearly 3 million food products by corporate giant Nestle USA.

Nestle USA announced the recall with a post on the Food and Drug Administration’s website. Recalled products included DiGiorno Thin & Crispy Spinach and Garlic Pizza, DiGiorno Rising Crust Spinach and Mushroom Pizza, DiGiorno Thin Crust Spinach and Mushroom Pizza and DiGiorno Tuscan-Style Chicken Pizza.

“No injuries have been reported,” Nestle USA noted in the announcement. “We are recalling these products because they may contain small pieces of glass that may cause injury.”

The post continues with an explanation: “Although our investigation is ongoing, we believe the source of the glass is spinach that was an ingredient common to the products subject to this recall. Nestle USA is taking this action out of an abundance of caution after several customers reported that they had found small pieces of glass in some of these products.” The exact connection between spinach and broken glass remains unclear, however.

Nestle also noted that only select lots of each product was affected by the recall. The company listed the production codes of the products involved and urged customers to check these codes before preparing their food.

DiGiorno also used social media to defuse the crisis, according to Inquisitr.com. One Twitter user tweeted, “wtf is this? I found small pieces of plastic or glass in my @DiGiornoPizza pizza, is this normal?” DiGiorno quickly responded, tweeting, “We want to help. Please send us a DM so we can learn more.”

Read the full recall announcement and view the relevant products and production codes here.